From e74fdb10725d30917ce1b6b39c968730133ba7ee Mon Sep 17 00:00:00 2001
From: Ruin0x11 <ipickering2@gmail.com>
Date: Fri, 25 Feb 2022 14:30:38 -0800
Subject: [PATCH] Make `chapter_titles` optional in Book

---
 src/book/book.rs | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/book/book.rs b/src/book/book.rs
index 08b18c49..ccfbdeff 100644
--- a/src/book/book.rs
+++ b/src/book/book.rs
@@ -128,6 +128,7 @@ pub struct Book {
     /// The sections in this book.
     pub sections: Vec<BookItem>,
     /// Chapter title overrides for this book.
+    #[serde(default)]
     pub chapter_titles: HashMap<PathBuf, String>,
     __non_exhaustive: (),
 }