diff --git a/src/main/java/org/ntlab/citrusserver/entities/Book.java b/src/main/java/org/ntlab/citrusserver/entities/Book.java
index 2a07749..79039a5 100644
--- a/src/main/java/org/ntlab/citrusserver/entities/Book.java
+++ b/src/main/java/org/ntlab/citrusserver/entities/Book.java
@@ -5,6 +5,7 @@
     private String title;
     private boolean publicity;
     private String color;
+    private int bookId;
 
     public void setTitle(String t) {title = t;}
     public String getTitle() {return title;}
@@ -12,4 +13,6 @@
     public boolean getPublicity() {return publicity;}
     public void setColor(String c) {color = c;}
     public String getColor() {return color;}
+    public void setBookId(int id) {bookId = id;}
+    public int getBookId() {return bookId;}
 }