diff --git a/backend/routes/books.js b/backend/routes/books.js
index d30bac197ca8b04ab4cf01fd8900285eb0ccfd57..986077c843bee17ca45706025e33730c4247bf6c 100644
--- a/backend/routes/books.js
+++ b/backend/routes/books.js
@@ -3,6 +3,7 @@ var router = express.Router();
 var books = require('../data/books.json');
 var fs = require('fs');
 var path = require('path');
+var User = require('../models/user');
 
 router.get('/', function(req, res) {
     console.log("=======Book Index=======");