Hi and welcome to DC
I don't have very many books on just one type of food, but after doing some research, I just might buy this one: http://www.amazon.com/Fish-Complete-...=cm_lmf_tit_32
The author, Mark Bittman, is a well-known chef and author. He writes for the New York Times and is executive editor of Cooks Illustrated, which I love. I don't know if it has good illustrations, but you can ask on Amazon. It has very good reviews there.
I would just suggest that you stay away from tilapia. Most of it comes from China and is usually contaminated with chemicals that are illegal to use in the United States. If you are interested in seafood sustainability, check out the Seafood Watch website for information on good and not so good choices: http://www.montereybayaquarium.org/cr/seafoodwatch.aspx
Hope this helps.