Teen Witch: Wicca for a New Generation by Silver RavenWolf: Very useful introduction to Wicca for young people. This book will teach you the basics you'll need for writing your own spells, as well as providing some spells of her own. I especially liked the section which tells the properties of everyday kitchen and supermarket stuff - it can be very handy for the teen or broomcloset Witch.
The Complete Idiot's Guide to Wicca and Witchcraft by Denise Zimmerman and Katherine A. Gleason: This book isn't just for idiots! It has very useful information on everything from the basics of the Wiccan religion, to spellcraft, to the properties of herbs, oils, and stones, to divination. A must-read! ISBN 0-02-863945-6
PAGE UNDER MAJOR CONSTRUCTION!
There'll be more here soon! :-) Until then, do a search in a search engine and check out some other Wicca/Pagan sites. There's plenty out there. I only wish some people would learn how to spell, though (no pun intended)...