MissingComponetException error

Hi I have been trying to learn more about arrays and how they work, I created an array of books as type GameObject and have Instantiated them in the Game window, It is my intention for the book to animate open when I click it with the mouse, However when I try to click on one of the books with the mouse I get the error "MissingComponetException" there is no Animation attached to the GameObject, I have also noticed the the Debug raycast line always points to the same location in the scene no what matter where I click the mouse in the Game window, could it be that the raycast isn't detecting I have clicked one of the books?

Any advice would be appreciated

thanks

 using UnityEngine;
 using System.Collections;
 using System.Collections.Generic;
 
 public class BookGame : MonoBehaviour
 {
     public GameObject[] books;
     public float gridX = 5;
     public float gridY = 5f;
     public float spacing = 2f;
 
     private Ray ray;
     private RaycastHit hit;    
     
     // Use this for initialization
     void Start () 
     {
 
         for (int y = 0; y < gridY; y++)
         {
             for (int x = 0; x < gridX; x++)
             {
                 //Vector3 pos = new Vector3(x, 0, y) * spacing;
                 int amount = Random.Range(0, books.Length);
                 Instantiate(books[amount], new Vector3(y * 2 * books[amount].transform.localScale.x * spacing, 10, x * 2 * books[amount].transform.localScale.z * spacing), Quaternion.identity);
             }
         }        
     }
 
 
     
     // Update is called once per frame
     void Update () 
     {
         if (Input.GetMouseButtonDown(0))
         {
             Debug.Log("Mouse Clicked");
             ray = Camera.main.ScreenPointToRay(Input.mousePosition);
             if (!Physics.Raycast(ray, out hit))
             {
                 Debug.DrawLine(ray.origin, hit.point);
                 Debug.Log("Check Action");
                 animation.CrossFade("OpenBook");
             }                
         }
     }     
 }