diff --git a/src/bin/mdbook.rs b/src/bin/mdbook.rs
index 29f6d806..09d5421a 100644
--- a/src/bin/mdbook.rs
+++ b/src/bin/mdbook.rs
@@ -1,8 +1,6 @@
-#[macro_use]
 extern crate mdbook;
 #[macro_use]
 extern crate clap;
-#[macro_use]
 extern crate log;
 extern crate env_logger;
 extern crate open;
@@ -204,9 +202,8 @@ fn watch(args: &ArgMatches) -> Result<(), Box<Error>> {
 
     trigger_on_change(&mut book, |path, book| {
         println!("File changed: {:?}\nBuilding book...\n", path);
-        match book.build() {
-            Err(e) => println!("Error while building: {:?}", e),
-            _ => {},
+        if let Err(e) = book.build() {
+            println!("Error while building: {:?}", e);
         }
         println!("");
     });
@@ -348,10 +345,10 @@ fn trigger_on_change<F>(book: &mut MDBook, closure: F) -> ()
 
     // Add the book.{json,toml} file to the watcher if it exists, because it's not
     // located in the source directory
-    if let Err(_) = watcher.watch(book.get_root().join("book.json"), NonRecursive) {
+    if watcher.watch(book.get_root().join("book.json"), NonRecursive).is_err() {
         // do nothing if book.json is not found
     }
-    if let Err(_) = watcher.watch(book.get_root().join("book.toml"), NonRecursive) {
+    if watcher.watch(book.get_root().join("book.toml"), NonRecursive).is_err() {
         // do nothing if book.toml is not found
     }
 
diff --git a/src/book/bookconfig.rs b/src/book/bookconfig.rs
index f0c2f241..34ac47d5 100644
--- a/src/book/bookconfig.rs
+++ b/src/book/bookconfig.rs
@@ -53,7 +53,7 @@ impl BookConfig {
                     exit(2);
                 }
             };
-            if let Err(_) = f.read_to_string(&mut data) {
+            if f.read_to_string(&mut data).is_err() {
                 error!("[*]: Failed to read {:?}", &path);
                 exit(2);
             }
@@ -81,9 +81,9 @@ impl BookConfig {
         self
     }
 
-    pub fn parse_from_toml_string(&mut self, data: &String) -> &mut Self {
+    pub fn parse_from_toml_string(&mut self, data: &str) -> &mut Self {
 
-        let mut parser = toml::Parser::new(&data);
+        let mut parser = toml::Parser::new(data);
 
         let config = match parser.parse() {
             Some(x) => {x},
@@ -99,9 +99,9 @@ impl BookConfig {
     }
 
     /// Parses the string to JSON and converts it to BTreeMap<String, toml::Value>.
-    pub fn parse_from_json_string(&mut self, data: &String) -> &mut Self {
+    pub fn parse_from_json_string(&mut self, data: &str) -> &mut Self {
 
-        let c: serde_json::Value = match serde_json::from_str(&data) {
+        let c: serde_json::Value = match serde_json::from_str(data) {
             Ok(x) => x,
             Err(e) => {
                 error!("[*]: JSON parse errors in book.json: {:?}", e);
@@ -109,7 +109,7 @@ impl BookConfig {
             }
         };
 
-        let config = json_object_to_btreemap(&c.as_object().unwrap());
+        let config = json_object_to_btreemap(c.as_object().unwrap());
         self.parse_from_btreemap(&config);
 
         self
diff --git a/src/book/bookitem.rs b/src/book/bookitem.rs
index bebd73bd..51773371 100644
--- a/src/book/bookitem.rs
+++ b/src/book/bookitem.rs
@@ -63,7 +63,7 @@ impl<'a> Iterator for BookItems<'a> {
                     },
                 }
             } else {
-                let cur = self.items.get(self.current_index).unwrap();
+                let cur = &self.items[self.current_index];
 
                 match *cur {
                     BookItem::Chapter(_, ref ch) | BookItem::Affix(ref ch) => {
diff --git a/src/book/mod.rs b/src/book/mod.rs
index 3332c371..1bc62b8f 100644
--- a/src/book/mod.rs
+++ b/src/book/mod.rs
@@ -346,29 +346,26 @@ impl MDBook {
         try!(self.parse_summary());
         for item in self.iter() {
 
-            match *item {
-                BookItem::Chapter(_, ref ch) => {
-                    if ch.path != PathBuf::new() {
+            if let BookItem::Chapter(_, ref ch) = *item {
+                if ch.path != PathBuf::new() {
 
-                        let path = self.get_src().join(&ch.path);
+                    let path = self.get_src().join(&ch.path);
 
-                        println!("[*]: Testing file: {:?}", path);
+                    println!("[*]: Testing file: {:?}", path);
 
-                        let output_result = Command::new("rustdoc")
-                                                .arg(&path)
-                                                .arg("--test")
-                                                .output();
-                        let output = try!(output_result);
+                    let output_result = Command::new("rustdoc")
+                                            .arg(&path)
+                                            .arg("--test")
+                                            .output();
+                    let output = try!(output_result);
 
-                        if !output.status.success() {
-                            return Err(Box::new(io::Error::new(ErrorKind::Other, format!(
-                                            "{}\n{}",
-                                            String::from_utf8_lossy(&output.stdout),
-                                            String::from_utf8_lossy(&output.stderr)))) as Box<Error>);
-                        }
+                    if !output.status.success() {
+                        return Err(Box::new(io::Error::new(ErrorKind::Other, format!(
+                                        "{}\n{}",
+                                        String::from_utf8_lossy(&output.stdout),
+                                        String::from_utf8_lossy(&output.stderr)))) as Box<Error>);
                     }
-                },
-                _ => {},
+                }
             }
         }
         Ok(())
@@ -381,14 +378,11 @@ impl MDBook {
     pub fn set_dest(mut self, dest: &Path) -> Self {
 
         // Handle absolute and relative paths
-        match dest.is_absolute() {
-            true => {
-                self.dest = dest.to_owned();
-            },
-            false => {
-                let dest = self.root.join(dest).to_owned();
-                self.dest = dest;
-            },
+        if dest.is_absolute() {
+            self.dest = dest.to_owned();
+        } else {
+            let dest = self.root.join(dest).to_owned();
+            self.dest = dest;
         }
 
         self
@@ -401,14 +395,11 @@ impl MDBook {
     pub fn set_src(mut self, src: &Path) -> Self {
 
         // Handle absolute and relative paths
-        match src.is_absolute() {
-            true => {
-                self.src = src.to_owned();
-            },
-            false => {
-                let src = self.root.join(src).to_owned();
-                self.src = src;
-            },
+        if src.is_absolute() {
+            self.src = src.to_owned();
+        } else {
+            let src = self.root.join(src).to_owned();
+            self.src = src;
         }
 
         self
@@ -456,16 +447,14 @@ impl MDBook {
     }
 
     pub fn get_livereload(&self) -> Option<&String> {
-        match self.livereload {
-            Some(ref livereload) => Some(&livereload),
-            None => None,
-        }
+        self.livereload.as_ref()
     }
 
     pub fn set_theme_path(mut self, theme_path: &Path) -> Self {
-        self.theme_path = match theme_path.is_absolute() {
-            true => theme_path.to_owned(),
-            false => self.root.join(theme_path).to_owned(),
+        self.theme_path = if theme_path.is_absolute() {
+            theme_path.to_owned()
+        } else {
+            self.root.join(theme_path).to_owned()
         };
         self
     }
diff --git a/src/parse/summary.rs b/src/parse/summary.rs
index 5b73e448..3d966355 100644
--- a/src/parse/summary.rs
+++ b/src/parse/summary.rs
@@ -47,12 +47,12 @@ fn parse_level(summary: &mut Vec<&str>, current_level: i32, mut section: Vec<i32
                 continue;
             } else {
                 return Err(Error::new(ErrorKind::Other,
-                                      format!("Your summary.md is messed up\n\n
+                                      "Your summary.md is messed up\n\n
                         Prefix, \
-                                               Suffix and Spacer elements can only exist on the root level.\n
+                                       Suffix and Spacer elements can only exist on the root level.\n
                         \
-                                               Prefix elements can only exist before any chapter and there can be \
-                                               no chapters after suffix elements.")));
+                                       Prefix elements can only exist before any chapter and there can be \
+                                       no chapters after suffix elements."));
             };
 
         } else {
@@ -64,25 +64,25 @@ fn parse_level(summary: &mut Vec<&str>, current_level: i32, mut section: Vec<i32
                     // error if level != 0 and BookItem is != Chapter
                     BookItem::Affix(_) | BookItem::Spacer if level > 0 => {
                         return Err(Error::new(ErrorKind::Other,
-                                              format!("Your summary.md is messed up\n\n
+                                              "Your summary.md is messed up\n\n
                                 \
-                                                       Prefix, Suffix and Spacer elements can only exist on the \
-                                                       root level.\n
+                                               Prefix, Suffix and Spacer elements can only exist on the \
+                                               root level.\n
                                 Prefix \
-                                                       elements can only exist before any chapter and there can be \
-                                                       no chapters after suffix elements.")))
+                                               elements can only exist before any chapter and there can be \
+                                               no chapters after suffix elements."))
                     },
 
                     // error if BookItem == Chapter and section == -1
                     BookItem::Chapter(_, _) if section[0] == -1 => {
                         return Err(Error::new(ErrorKind::Other,
-                                              format!("Your summary.md is messed up\n\n
+                                              "Your summary.md is messed up\n\n
                                 \
-                                                       Prefix, Suffix and Spacer elements can only exist on the \
-                                                       root level.\n
+                                               Prefix, Suffix and Spacer elements can only exist on the \
+                                               root level.\n
                                 Prefix \
-                                                       elements can only exist before any chapter and there can be \
-                                                       no chapters after suffix elements.")))
+                                               elements can only exist before any chapter and there can be \
+                                               no chapters after suffix elements."))
                     },
 
                     // Set section = -1 after suffix
diff --git a/src/renderer/html_handlebars/hbs_renderer.rs b/src/renderer/html_handlebars/hbs_renderer.rs
index b122ed14..dc69f8c7 100644
--- a/src/renderer/html_handlebars/hbs_renderer.rs
+++ b/src/renderer/html_handlebars/hbs_renderer.rs
@@ -15,6 +15,7 @@ use handlebars::Handlebars;
 use serde_json;
 
 
+#[derive(Default)]
 pub struct HtmlHandlebars;
 
 impl HtmlHandlebars {
@@ -48,7 +49,7 @@ impl Renderer for HtmlHandlebars {
 
         // Check if dest directory exists
         debug!("[*]: Check if destination directory exists");
-        if let Err(_) = fs::create_dir_all(book.get_dest()) {
+        if fs::create_dir_all(book.get_dest()).is_err() {
             return Err(Box::new(io::Error::new(io::ErrorKind::Other,
                                                "Unexpected error when constructing destination path")));
         }
@@ -81,8 +82,8 @@ impl Renderer for HtmlHandlebars {
                         print_content.push_str(&content);
 
                         // Update the context with data for this file
-                        let path = ch.path.to_str().ok_or(io::Error::new(io::ErrorKind::Other,
-                                                          "Could not convert path to str"))?;
+                        let path = ch.path.to_str().ok_or_else(||
+                            io::Error::new(io::ErrorKind::Other, "Could not convert path to str"))?;
                         data.insert("path".to_owned(), json!(path));
                         data.insert("content".to_owned(), json!(content));
                         data.insert("chapter_title".to_owned(), json!(ch.name));
@@ -183,15 +184,15 @@ fn make_data(book: &MDBook) -> Result<serde_json::Map<String, serde_json::Value>
         match *item {
             BookItem::Affix(ref ch) => {
                 chapter.insert("name".to_owned(), json!(ch.name));
-                let path = ch.path.to_str().ok_or(io::Error::new(io::ErrorKind::Other,
-                                                                 "Could not convert path to str"))?;
+                let path = ch.path.to_str().ok_or_else(||
+                    io::Error::new(io::ErrorKind::Other, "Could not convert path to str"))?;
                 chapter.insert("path".to_owned(), json!(path));
             },
             BookItem::Chapter(ref s, ref ch) => {
                 chapter.insert("section".to_owned(), json!(s));
                 chapter.insert("name".to_owned(), json!(ch.name));
-                let path = ch.path.to_str().ok_or(io::Error::new(io::ErrorKind::Other,
-                                                                 "Could not convert path to str"))?;
+                let path = ch.path.to_str().ok_or_else(||
+                    io::Error::new(io::ErrorKind::Other, "Could not convert path to str"))?;
                 chapter.insert("path".to_owned(), json!(path));
             },
             BookItem::Spacer => {
diff --git a/src/renderer/html_handlebars/helpers/playpen.rs b/src/renderer/html_handlebars/helpers/playpen.rs
index 8cf9059f..978a0a13 100644
--- a/src/renderer/html_handlebars/helpers/playpen.rs
+++ b/src/renderer/html_handlebars/helpers/playpen.rs
@@ -31,7 +31,7 @@ pub fn render_playpen(s: &str, path: &Path) -> String {
             continue;
         };
         let mut file_content = String::new();
-        if let Err(_) = file.read_to_string(&mut file_content) {
+        if file.read_to_string(&mut file_content).is_err() {
             continue;
         };
 
@@ -86,7 +86,7 @@ fn find_playpens(s: &str, base_path: &Path) -> Vec<Playpen> {
         if end_i - 2 - (i + 10) < 1 {
             continue;
         }
-        if s[i + 10..end_i - 2].trim().len() == 0 {
+        if s[i + 10..end_i - 2].trim().is_empty() {
             continue;
         }
 
@@ -94,15 +94,10 @@ fn find_playpens(s: &str, base_path: &Path) -> Vec<Playpen> {
 
         // Split on whitespaces
         let params: Vec<&str> = s[i + 10..end_i - 2].split_whitespace().collect();
-        let mut editable = false;
-
-        if params.len() > 1 {
-            editable = if let Some(_) = params[1].find("editable") {
-                true
-            } else {
-                false
-            };
-        }
+        let editable = params
+            .get(1)
+            .map(|p| p.find("editable").is_some())
+            .unwrap_or(false);
 
         playpens.push(Playpen {
             start_index: i,
diff --git a/src/renderer/html_handlebars/helpers/toc.rs b/src/renderer/html_handlebars/helpers/toc.rs
index 7d19dfff..3fb7b904 100644
--- a/src/renderer/html_handlebars/helpers/toc.rs
+++ b/src/renderer/html_handlebars/helpers/toc.rs
@@ -17,7 +17,7 @@ impl HelperDef for RenderToc {
         // param is the key of value you want to display
         let chapters = rc.context().navigate(rc.get_path(), &VecDeque::new(), "chapters").to_owned();
         let current = rc.context().navigate(rc.get_path(), &VecDeque::new(), "path").to_string().replace("\"", "");
-        try!(rc.writer.write("<ul class=\"chapter\">".as_bytes()));
+        try!(rc.writer.write_all("<ul class=\"chapter\">".as_bytes()));
 
         // Decode json format
         let decoded: Vec<BTreeMap<String, String>> = serde_json::from_str(&chapters.to_string()).unwrap();
@@ -27,8 +27,8 @@ impl HelperDef for RenderToc {
         for item in decoded {
 
             // Spacer
-            if let Some(_) = item.get("spacer") {
-                try!(rc.writer.write("<li class=\"spacer\"></li>".as_bytes()));
+            if item.get("spacer").is_some() {
+                try!(rc.writer.write_all("<li class=\"spacer\"></li>".as_bytes()));
                 continue;
             }
 
@@ -40,33 +40,33 @@ impl HelperDef for RenderToc {
 
             if level > current_level {
                 while level > current_level {
-                    try!(rc.writer.write("<li>".as_bytes()));
-                    try!(rc.writer.write("<ul class=\"section\">".as_bytes()));
+                    try!(rc.writer.write_all("<li>".as_bytes()));
+                    try!(rc.writer.write_all("<ul class=\"section\">".as_bytes()));
                     current_level += 1;
                 }
-                try!(rc.writer.write("<li>".as_bytes()));
+                try!(rc.writer.write_all("<li>".as_bytes()));
             } else if level < current_level {
                 while level < current_level {
-                    try!(rc.writer.write("</ul>".as_bytes()));
-                    try!(rc.writer.write("</li>".as_bytes()));
+                    try!(rc.writer.write_all("</ul>".as_bytes()));
+                    try!(rc.writer.write_all("</li>".as_bytes()));
                     current_level -= 1;
                 }
-                try!(rc.writer.write("<li>".as_bytes()));
+                try!(rc.writer.write_all("<li>".as_bytes()));
             } else {
-                try!(rc.writer.write("<li".as_bytes()));
-                if let None = item.get("section") {
-                    try!(rc.writer.write(" class=\"affix\"".as_bytes()));
+                try!(rc.writer.write_all("<li".as_bytes()));
+                if item.get("section").is_none() {
+                    try!(rc.writer.write_all(" class=\"affix\"".as_bytes()));
                 }
-                try!(rc.writer.write(">".as_bytes()));
+                try!(rc.writer.write_all(">".as_bytes()));
             }
 
             // Link
             let path_exists = if let Some(path) = item.get("path") {
                 if !path.is_empty() {
-                    try!(rc.writer.write("<a href=\"".as_bytes()));
+                    try!(rc.writer.write_all("<a href=\"".as_bytes()));
 
                     // Add link
-                    try!(rc.writer.write(Path::new(item.get("path")
+                    try!(rc.writer.write_all(Path::new(item.get("path")
                                                        .expect("Error: path should be Some(_)"))
                                              .with_extension("html")
                                              .to_str()
@@ -75,13 +75,13 @@ impl HelperDef for RenderToc {
                                              .replace("\\", "/")
                                              .as_bytes()));
 
-                    try!(rc.writer.write("\"".as_bytes()));
+                    try!(rc.writer.write_all("\"".as_bytes()));
 
                     if path == &current {
-                        try!(rc.writer.write(" class=\"active\"".as_bytes()));
+                        try!(rc.writer.write_all(" class=\"active\"".as_bytes()));
                     }
 
-                    try!(rc.writer.write(">".as_bytes()));
+                    try!(rc.writer.write_all(">".as_bytes()));
                     true
                 } else {
                     false
@@ -92,21 +92,21 @@ impl HelperDef for RenderToc {
 
             // Section does not necessarily exist
             if let Some(section) = item.get("section") {
-                try!(rc.writer.write("<strong>".as_bytes()));
-                try!(rc.writer.write(section.as_bytes()));
-                try!(rc.writer.write("</strong> ".as_bytes()));
+                try!(rc.writer.write_all("<strong>".as_bytes()));
+                try!(rc.writer.write_all(section.as_bytes()));
+                try!(rc.writer.write_all("</strong> ".as_bytes()));
             }
 
             if let Some(name) = item.get("name") {
                 // Render only inline code blocks
 
                 // filter all events that are not inline code blocks
-                let parser = Parser::new(&name).filter(|event| {
-                    match event {
-                        &Event::Start(Tag::Code) |
-                        &Event::End(Tag::Code) => true,
-                        &Event::InlineHtml(_) => true,
-                        &Event::Text(_) => true,
+                let parser = Parser::new(name).filter(|event| {
+                    match *event {
+                        Event::Start(Tag::Code) |
+                        Event::End(Tag::Code) |
+                        Event::InlineHtml(_) |
+                        Event::Text(_) => true,
                         _ => false,
                     }
                 });
@@ -116,23 +116,23 @@ impl HelperDef for RenderToc {
                 html::push_html(&mut markdown_parsed_name, parser);
 
                 // write to the handlebars template
-                try!(rc.writer.write(markdown_parsed_name.as_bytes()));
+                try!(rc.writer.write_all(markdown_parsed_name.as_bytes()));
             }
 
             if path_exists {
-                try!(rc.writer.write("</a>".as_bytes()));
+                try!(rc.writer.write_all("</a>".as_bytes()));
             }
 
-            try!(rc.writer.write("</li>".as_bytes()));
+            try!(rc.writer.write_all("</li>".as_bytes()));
 
         }
         while current_level > 1 {
-            try!(rc.writer.write("</ul>".as_bytes()));
-            try!(rc.writer.write("</li>".as_bytes()));
+            try!(rc.writer.write_all("</ul>".as_bytes()));
+            try!(rc.writer.write_all("</li>".as_bytes()));
             current_level -= 1;
         }
 
-        try!(rc.writer.write("</ul>".as_bytes()));
+        try!(rc.writer.write_all("</ul>".as_bytes()));
         Ok(())
     }
 }
diff --git a/src/utils/mod.rs b/src/utils/mod.rs
index 59db1999..ce98ee50 100644
--- a/src/utils/mod.rs
+++ b/src/utils/mod.rs
@@ -14,7 +14,7 @@ pub fn render_markdown(text: &str) -> String {
     opts.insert(OPTION_ENABLE_TABLES);
     opts.insert(OPTION_ENABLE_FOOTNOTES);
 
-    let p = Parser::new_ext(&text, opts);
+    let p = Parser::new_ext(text, opts);
     html::push_html(&mut s, p);
     s
 }