Kevin's book is great . . . the book from VPI is awesome too. If you can afford both I think they're both worth it.

There are quite a few great sites that include detailed info on breeding that you might want to check out. Here are a couple that I usually refer people to:

http://www.joecompelreptiles.com/ball_bits/index.asp

http://www.ballpython.ca/gallery/breeding.html

Also, BP.net has many, many experienced breeders that willingly give their time to answer questions from individuals starting out . . . it's a great community.

Good luck