The Corn Snake Manual (The Herpetocultural Library)
The Ball Python Manual (The Herpetocultural Library)
Kingsnakes and Milksnakes (Barron's)
Burmese Pythons (John Corborn)
Keeping and Breeding Snakes (Chris Mattison)
The Biology, Husbandry and Health Care of Reptiles Volume I & II (Lowell Ackerman, DVM)
The last two were presents from me to katey, I still have to find her volume III as well.