package killbait.PrimordialCrops.Utils;

public class GuiHandler implements IGuiHandler {

    @Override
    public Object getServerGuiElement(int ID, EntityPlayer player, World world, int x, int y, int z) {
        return null;
    }

    @Override
    public Object getClientGuiElement(int ID, EntityPlayer player, World world, int x, int y, int z) {
        return null;
    }
}

@@ -83,16 +83,67 @@
 ndler %7B%0A
+    %0A    public static final int GUI_BOOK = 0;%0A    
 %0A    @Ov
@@ -389,32 +389,100 @@
 int y, int z) %7B%0A
+         if (ID == GUI_BOOK)%0A        return new GuiBook();%0A        %0A
         return n

Update GuiHandler.java