public void OnObjectUnSnapped()
{
sparkleEmission.enabled = true;
cauldron.DeselectBook();
Book closestbook = ClosestBook();
closestbook.Close();
bookCloseSound.Play();
closestbook.GetComponent <Rigidbody> ().AddForce(Vector3.up * 1 + transform.up * 1, ForceMode.VelocityChange);
}