diff --git a/src/opinion/SocialNetwork.java b/src/opinion/SocialNetwork.java
index f2ccb604cfa25ae8311936063fe1e97d88a9a6d0..11431320dc72a126ae6fae45b34217efd1fe9668 100644
--- a/src/opinion/SocialNetwork.java
+++ b/src/opinion/SocialNetwork.java
@@ -63,7 +63,7 @@ public class SocialNetwork implements ISocialNetwork {
     @Override
     public int nbBooks() {
         // TODO Auto-generated method stub
-        return nbbooks;
+        return listBook.size();
     }
 
     /**