diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..12744dd
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "themes/hugo-book"]
+	path = themes/hugo-book
+	url = https://github.com/alex-shpak/hugo-book
diff --git a/themes/hugo-book b/themes/hugo-book
new file mode 160000
index 0000000..5e15ddb
--- /dev/null
+++ b/themes/hugo-book
@@ -0,0 +1 @@
+Subproject commit 5e15ddb4f430cd9ded6bf232ede14d468ccb41f1