diff --git a/app/src/main/java/com/example/citrusclient/models/Book.java b/app/src/main/java/com/example/citrusclient/models/Book.java
index 19140a2..7f2cc6f 100644
--- a/app/src/main/java/com/example/citrusclient/models/Book.java
+++ b/app/src/main/java/com/example/citrusclient/models/Book.java
@@ -9,7 +9,7 @@
     private String accountId;
 
 
-    public Book(String accountId, Integer bookId, String title, boolean publicity, String color, String time) {
+    public Book(String accountId, Integer bookId, String title, boolean publicity, String color) {
         this.accountId = accountId;
         this.bookId = bookId;
         this.title = title;
diff --git a/app/src/main/java/com/example/citrusclient/rest/BooksRest.java b/app/src/main/java/com/example/citrusclient/rest/BooksRest.java
index 13cbfcd..47ba3ef 100644
--- a/app/src/main/java/com/example/citrusclient/rest/BooksRest.java
+++ b/app/src/main/java/com/example/citrusclient/rest/BooksRest.java
@@ -3,6 +3,8 @@
 import com.example.citrusclient.models.Book;
 
 
+import java.util.HashMap;
+
 import retrofit2.Call;
 import retrofit2.Response;
 import retrofit2.http.DELETE;
@@ -18,7 +20,7 @@
 
     //本の一覧を返す
     @GET("accounts/{account_id}/books")
-    Call<Book> getBooks(
+    Call<HashMap<Integer, Book>> getBooks(
             @Path("account_id") String account_id,
             @Query("token") String token
     );