diff --git a/book.json b/book.json
index 245c836..d07078c 100644
--- a/book.json
+++ b/book.json
@@ -5,9 +5,5 @@
             "url": "https://github.com/lefticus/cppbestpractices"
         }
     }
-    ,
-    "structure": {
-        "readme": "01-Preface.md"
-    }
-    
+
 }