diff --git a/src/main/java/org/ntlab/citrusserver/repositories/PublicBookManager.java b/src/main/java/org/ntlab/citrusserver/repositories/PublicBookManager.java
index 3969edb..1e5761d 100644
--- a/src/main/java/org/ntlab/citrusserver/repositories/PublicBookManager.java
+++ b/src/main/java/org/ntlab/citrusserver/repositories/PublicBookManager.java
@@ -5,6 +5,7 @@
 import org.springframework.stereotype.Repository;
 
 import java.util.ArrayList;
+import java.util.Comparator;
 import java.util.HashMap;
 import java.util.HashSet;
 import java.util.regex.*;
@@ -42,8 +43,11 @@
 
 
     public ArrayList<Book> searchBooksByTitle(String title, int sortBy){
-        ArrayList<Book> result = searchBooksByTitle(title);
-//        result.sort(Comparator.comparing(Book::))
+        if(sortBy == 0){
+            ArrayList<Book> result = searchBooksByTitle(title);
+            result.sort(Comparator.comparing(Book::getTime));
+            return result;
+        }
         return null;
     }