diff --git a/.gitmodules b/.gitmodules
index ecb716b2..29d966ae 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -6,3 +6,14 @@
 	path = assets/files
 	url = https://github.com/Myriad-Dreamin/typst.git
 	branch = assets-files
+
+[submodule "projects/typst-preview"]
+	path = projects/typst-preview
+	url = https://github.com/Enter-tainer/typst-preview.git
+	branch = main
+	fetchRecurseSubmodules = false
+[submodule "projects/typst-book"]
+	path = projects/typst-book
+	url = https://github.com/Myriad-Dreamin/typst-book.git
+	branch = main
+	fetchRecurseSubmodules = false
diff --git a/projects/typst-book b/projects/typst-book
new file mode 160000
index 00000000..a5ec5d7f
--- /dev/null
+++ b/projects/typst-book
@@ -0,0 +1 @@
+Subproject commit a5ec5d7f40802aa2d2e06d9fd540baae1d8ba7d9
diff --git a/projects/typst-preview b/projects/typst-preview
new file mode 160000
index 00000000..110c031d
--- /dev/null
+++ b/projects/typst-preview
@@ -0,0 +1 @@
+Subproject commit 110c031d21e74f747f78fbf78934140d23fec267