diff --git a/.gitmodules b/.gitmodules
index a7063bbddc5..d2e1fb868a9 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -27,3 +27,6 @@
 [submodule "reference"]
 	path = src/doc/reference
 	url = https://github.com/rust-lang-nursery/reference.git
+[submodule "book"]
+	path = src/doc/book
+	url = https://github.com/rust-lang/book
diff --git a/src/doc/book b/src/doc/book
new file mode 160000
index 00000000000..979c56634f3
--- /dev/null
+++ b/src/doc/book
@@ -0,0 +1 @@
+Subproject commit 979c56634f3fe594c9554c555eee29311d7d4a50