First of all, apologies if this has been raised before. My 6 year old collie is getting a bit bored as he can no longer do serious agility and I was thinking of using clicker training to teach him some tricks and just to generally make him use his little brain. He's a typical collie who has undergone a personality change since my older dog died a couple of months ago!! I did try using a clicker many years ago, but the book I had (I can't remember its name, it was a very small pamphlet-type which came with the clicker) just confused me and I gave up. In the interim, I have read a lot more around training and learning in general and feel I have a better grasp of what it's about. Can anyone recommend a good book, which is clear and concise?