diff --git a/src/main/java/org/ntlab/citrusserver/repositories/PublicBookManager.java b/src/main/java/org/ntlab/citrusserver/repositories/PublicBookManager.java
index 7d7b6d0..23e239e 100644
--- a/src/main/java/org/ntlab/citrusserver/repositories/PublicBookManager.java
+++ b/src/main/java/org/ntlab/citrusserver/repositories/PublicBookManager.java
@@ -4,10 +4,7 @@
 import org.ntlab.citrusserver.entities.Book;
 import org.springframework.stereotype.Repository;
 
-import java.util.ArrayList;
-import java.util.Comparator;
-import java.util.HashMap;
-import java.util.HashSet;
+import java.util.*;
 import java.util.regex.*;
 
 
@@ -28,6 +25,15 @@
         return books;
     }
 
+    public ArrayList<Book> getAllPublicBooks(int sortBy){
+        if(sortBy == 0){
+            ArrayList<Book> books = getAllPublicBooks();
+            books.sort(Comparator.comparing(Book::getTime).reversed());
+            return books;
+        }
+        return null;
+    }
+
     public ArrayList<Book> searchBooksByTitle(String title){
         ArrayList<Book> books = new ArrayList<>();
         var ptn = Pattern.compile(title);
@@ -83,6 +89,15 @@
         return result;
     }
 
+    public ArrayList<Book> searchBooksByTitleAndAccount(String title, String accountId, int sortBy){
+        if (sortBy == 0) {
+            ArrayList<Book> result = searchBooksByTitleAndAccount(title, accountId);
+            result.sort(Comparator.comparing(Book::getTime).reversed());
+            return result;
+        }
+        return null;
+    }
+
     @Override
     public void bookChanged(Account account, Book book) {
         if(book.getPublicity()){