diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000000000000000000000000000000000000..55dae027fe240ac941f09671c0ddc521eb9ad035
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "book"]
+	path = book
+	url = https://github.com/PaddlePaddle/book.git
\ No newline at end of file
diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index a6e45028ebc3f53ea20806f0dd2a7acc820607fe..3402223b044b8950e7772f4d87cc64e5772f8dcd 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -2,12 +2,12 @@
     sha: c25201a00e6b0514370501050cf2a8538ac12270
     hooks:
     -   id: remove-crlf
-        files: (?!.*third_party)^.*$
+        files: (?!.*third_party)^.*$ | (?!.*book)^.*$
 -   repo: https://github.com/reyoung/mirrors-yapf.git
     sha: v0.13.2
     hooks:
     - id: yapf
-      files: (.*\.(py|bzl)|BUILD|.*\.BUILD|WORKSPACE)$  # Bazel BUILD files follow Python syntax.
+      files: (.*\.(py|bzl)|BUILD|.*\.BUILD|WORKSPACE)$
 -   repo: https://github.com/pre-commit/pre-commit-hooks
     sha: 7539d8bd1a00a3c1bfd34cdb606d3a6372e83469
     hooks:
@@ -15,7 +15,7 @@
     -   id: check-merge-conflict
     -   id: check-symlinks
     -   id: detect-private-key
-        files: (?!.*third_party)^.*$
+        files: (?!.*third_party)^.*$ | (?!.*book)^.*$
     -   id: end-of-file-fixer
 -   repo: https://github.com/PaddlePaddle/clang-format-pre-commit-hook.git
     sha: 28c0ea8a67a3e2dbbf4822ef44e85b63a0080a29