diff --git a/src/main/java/org/ntlab/citrusserver/repositories/PublicBookManager.java b/src/main/java/org/ntlab/citrusserver/repositories/PublicBookManager.java
index 1e5761d..7d7b6d0 100644
--- a/src/main/java/org/ntlab/citrusserver/repositories/PublicBookManager.java
+++ b/src/main/java/org/ntlab/citrusserver/repositories/PublicBookManager.java
@@ -45,7 +45,7 @@
     public ArrayList<Book> searchBooksByTitle(String title, int sortBy){
         if(sortBy == 0){
             ArrayList<Book> result = searchBooksByTitle(title);
-            result.sort(Comparator.comparing(Book::getTime));
+            result.sort(Comparator.comparing(Book::getTime).reversed());
             return result;
         }
         return null;
@@ -64,6 +64,11 @@
     }
 
     public ArrayList<Book> searchBooksByAccount(String accountId, int sortBy){
+        if(sortBy == 0){
+            ArrayList<Book> result = searchBooksByAccount(accountId);
+            result.sort(Comparator.comparing(Book::getTime).reversed());
+            return result;
+        }
         return null;
     }