diff --git a/src/book/init.rs b/src/book/init.rs
index e24efafd..a70006bb 100644
--- a/src/book/init.rs
+++ b/src/book/init.rs
@@ -134,9 +134,6 @@ impl BookBuilder {
         let mut general_css = File::create(cssdir.join("general.css"))?;
         general_css.write_all(theme::GENERAL_CSS)?;
 
-        let mut book_css = File::create(cssdir.join("book.css"))?;
-        book_css.write_all(theme::BOOK_CSS)?;
-
         let mut chrome_css = File::create(cssdir.join("chrome.css"))?;
         chrome_css.write_all(theme::CHROME_CSS)?;
 
diff --git a/src/renderer/html_handlebars/hbs_renderer.rs b/src/renderer/html_handlebars/hbs_renderer.rs
index ab0d6b6f..82ced929 100644
--- a/src/renderer/html_handlebars/hbs_renderer.rs
+++ b/src/renderer/html_handlebars/hbs_renderer.rs
@@ -123,7 +123,6 @@ impl HtmlHandlebars {
 
         write_file(destination, "book.js", &theme.js)?;
         write_file(destination, "css/general.css", &theme.general_css)?;
-        write_file(destination, "css/book.css", &theme.book_css)?;
         write_file(destination, "css/chrome.css", &theme.chrome_css)?;
         write_file(destination, "css/print.css", &theme.print_css)?;
         write_file(destination, "css/variables.css", &theme.variables_css)?;
@@ -558,7 +557,7 @@ fn fix_code_blocks(html: &str) -> String {
             let after = &caps[3];
 
             format!(
-                r#"<code{before}class="block  {classes}"{after}>"#,
+                r#"<code{before}class="{classes}"{after}>"#,
                 before = before,
                 classes = classes,
                 after = after
diff --git a/src/theme/book.js b/src/theme/book.js
index e6de2ca7..1aff593f 100644
--- a/src/theme/book.js
+++ b/src/theme/book.js
@@ -330,19 +330,11 @@ function playpen_text(playpen) {
             stylesheets.ayuHighlight.disabled = false;
             stylesheets.tomorrowNight.disabled = true;
             stylesheets.highlight.disabled = true;
-
-            ace_theme = "ace/theme/tomorrow_night";
-        } else if (theme == 'book') {
-            stylesheets.ayuHighlight.disabled = true;
-            stylesheets.tomorrowNight.disabled = true;
-            stylesheets.highlight.disabled = true;
-
             ace_theme = "ace/theme/tomorrow_night";
         } else {
             stylesheets.ayuHighlight.disabled = true;
             stylesheets.tomorrowNight.disabled = true;
             stylesheets.highlight.disabled = false;
-
             ace_theme = "ace/theme/dawn";
         }
 
diff --git a/src/theme/css/book.css b/src/theme/css/book.css
deleted file mode 100644
index e129bf81..00000000
--- a/src/theme/css/book.css
+++ /dev/null
@@ -1,65 +0,0 @@
-body {
-    font-family: "Source Serif Pro", serif;
-}
-p {
-    text-align: justify;
-    line-height: 1.25em;
-}
-code {
-    font-family: "Source Code Pro", monospace;
-    padding: 0 !important;
-}
-code:not(.block) {
-    padding: 0 0 1pt 0 !important;
-}
-code:not(.block)::before {
-    content: '‘';
-}
-code:not(.block)::after {
-    content: '’';
-}
-pre {
-    margin-left: 2em;
-}
-pre pre {
-    margin-left: 0;
-}
-pre.playpen > div.buttons {
-    float: right;
-    height: 0;
-}
-em {
-    font-style: italic;
-}
-h3::before {
-    content: "¶";
-    width: 1em;
-    display: inline-block;
-    margin-left: -1em;
-}
-h4::before {
-    content: "§";
-    width: 1em;
-    display: inline-block;
-    margin-left: -1em;
-}
-.left-buttons {
-    position: absolute;
-}
-.right-buttons {
-    position: absolute;
-    right: 0;
-}
-    
-#menu-bar-sticky-container {
-    background-color: rgba(255, 255, 255, 0.8) !important;
-}
-
-@media print {
-    .menu-bar, .buttons {
-        display: none;
-    }
-    body {
-        font-size: 11pt;
-    }
-}
diff --git a/src/theme/index.hbs b/src/theme/index.hbs
index 5e0d7013..4e29807c 100644
--- a/src/theme/index.hbs
+++ b/src/theme/index.hbs
@@ -17,18 +17,18 @@
         <link rel="stylesheet" href="{{ path_to_root }}css/variables.css">
         <link rel="stylesheet" href="{{ path_to_root }}css/general.css">
         <link rel="stylesheet" href="{{ path_to_root }}css/chrome.css">
-        <link rel="stylesheet" href="{{ path_to_root }}css/book.css">
         <link rel="stylesheet" href="{{ path_to_root }}css/print.css" media="print">
 
         <!-- Fonts -->
         <link rel="stylesheet" href="{{ path_to_root }}FontAwesome/css/font-awesome.css">
         <link href="https://fonts.googleapis.com/css?family=Open+Sans:300italic,400italic,600italic,700italic,800italic,400,300,600,700,800" rel="stylesheet" type="text/css">
-        <link href="https://fonts.googleapis.com/css?family=Source+Code+Pro|Source+Serif+Pro" rel="stylesheet">
+        <link href="https://fonts.googleapis.com/css?family=Source+Code+Pro:500" rel="stylesheet" type="text/css">
 
         <!-- Highlight.js Stylesheets -->
         <link rel="stylesheet" href="{{ path_to_root }}highlight.css">
         <link rel="stylesheet" href="{{ path_to_root }}tomorrow-night.css">
         <link rel="stylesheet" href="{{ path_to_root }}ayu-highlight.css">
+
         <!-- Custom theme stylesheets -->
         {{#each additional_css}}
         <link rel="stylesheet" href="{{ ../path_to_root }}{{ this }}">
@@ -109,7 +109,6 @@
                                 <li role="none"><button role="menuitem" class="theme" id="coal">{{ theme_option "Coal" }}</button></li>
                                 <li role="none"><button role="menuitem" class="theme" id="navy">{{ theme_option "Navy" }}</button></li>
                                 <li role="none"><button role="menuitem" class="theme" id="ayu">{{ theme_option "Ayu" }}</button></li>
-                                <li role="none"><button role="menuitem" class="theme" id="book">{{ theme_option "Book" }}</button></li>
                             </ul>
                             {{#if search_enabled}}
                             <button id="search-toggle" class="icon-button" type="button" title="Search. (Shortkey: s)" aria-label="Toggle Searchbar" aria-expanded="false" aria-keyshortcuts="S" aria-controls="searchbar">
diff --git a/src/theme/mod.rs b/src/theme/mod.rs
index 22f1550e..37d373ef 100644
--- a/src/theme/mod.rs
+++ b/src/theme/mod.rs
@@ -15,7 +15,6 @@ pub static INDEX: &'static [u8] = include_bytes!("index.hbs");
 pub static HEADER: &'static [u8] = include_bytes!("header.hbs");
 pub static CHROME_CSS: &'static [u8] = include_bytes!("css/chrome.css");
 pub static GENERAL_CSS: &'static [u8] = include_bytes!("css/general.css");
-pub static BOOK_CSS: &'static [u8] = include_bytes!("css/book.css");
 pub static PRINT_CSS: &'static [u8] = include_bytes!("css/print.css");
 pub static VARIABLES_CSS: &'static [u8] = include_bytes!("css/variables.css");
 pub static FAVICON: &'static [u8] = include_bytes!("favicon.png");
@@ -50,7 +49,6 @@ pub struct Theme {
     pub header: Vec<u8>,
     pub chrome_css: Vec<u8>,
     pub general_css: Vec<u8>,
-    pub book_css: Vec<u8>,
     pub print_css: Vec<u8>,
     pub variables_css: Vec<u8>,
     pub favicon: Vec<u8>,
@@ -82,7 +80,6 @@ impl Theme {
                 (theme_dir.join("book.js"), &mut theme.js),
                 (theme_dir.join("css/chrome.css"), &mut theme.chrome_css),
                 (theme_dir.join("css/general.css"), &mut theme.general_css),
-                (theme_dir.join("css/book.css"), &mut theme.book_css),
                 (theme_dir.join("css/print.css"), &mut theme.print_css),
                 (
                     theme_dir.join("css/variables.css"),
@@ -124,7 +121,6 @@ impl Default for Theme {
             header: HEADER.to_owned(),
             chrome_css: CHROME_CSS.to_owned(),
             general_css: GENERAL_CSS.to_owned(),
-            book_css: BOOK_CSS.to_owned(),
             print_css: PRINT_CSS.to_owned(),
             variables_css: VARIABLES_CSS.to_owned(),
             favicon: FAVICON.to_owned(),
@@ -180,7 +176,6 @@ mod tests {
             "favicon.png",
             "css/chrome.css",
             "css/general.css",
-            "css/book.css",
             "css/print.css",
             "css/variables.css",
             "book.js",
@@ -213,7 +208,6 @@ mod tests {
             highlight_css: Vec::new(),
             tomorrow_night_css: Vec::new(),
             ayu_highlight_css: Vec::new(),
-            book_css: Vec::new(),
             highlight_js: Vec::new(),
             clipboard_js: Vec::new(),
         };
diff --git a/tests/rendered_output.rs b/tests/rendered_output.rs
index 2aa7f93a..e5d07243 100644
--- a/tests/rendered_output.rs
+++ b/tests/rendered_output.rs
@@ -419,7 +419,6 @@ fn theme_dir_overrides_work_correctly() {
     dummy_book::assert_contains_strings(built_index, &["This is a modified index.hbs!"]);
 }
 
-
 #[test]
 fn no_index_for_print_html() {
     let temp = DummyBook::new().build().unwrap();