diff --git a/book.json b/book.json
index e69de29..ccc22f8 100644
--- a/book.json
+++ b/book.json
@@ -0,0 +1,5 @@
+{
+    "structure": {
+        "readme": "01-Preface.md"
+    }
+}
\ No newline at end of file