diff --git a/src/main/java/org/ntlab/citrusserver/repositories/PublicBookManager.java b/src/main/java/org/ntlab/citrusserver/repositories/PublicBookManager.java
index 907e5ee..bde074a 100644
--- a/src/main/java/org/ntlab/citrusserver/repositories/PublicBookManager.java
+++ b/src/main/java/org/ntlab/citrusserver/repositories/PublicBookManager.java
@@ -11,7 +11,8 @@
 @Repository
 public class PublicBookManager implements IBookListener{
 
-    private final HashMap<String, HashSet<Book>> publicBooks = new HashMap<>();
+    private final HashMap<String, //accountId
+            HashSet<Book>> publicBooks = new HashMap<>();
 
     private final FavoriteManager favoriteManager;
 
@@ -28,6 +29,8 @@
         return books;
     }
 
+
+
     public ArrayList<Book> getAllPublicBooks(int sortBy){
         return sort(getAllPublicBooks(), sortBy);
     }
@@ -97,7 +100,9 @@
 
     @Override
     public void bookDeleted(Account account, Book book) {
-
+        if(publicBooks.containsKey(account.getId())){
+            publicBooks.get(account.getId()).remove(book);
+        }
     }
 
     private ArrayList<Book> sort(ArrayList<Book> books, int sortMode){