"The Witches Shield" is a great way  to learn about or brush up on psychic protection with the added benefit of a CD to talk you through meditations and rituals. A great buy.

"Where to Park Your Broomstick" is a great introductory book for teen witches.

"Which Witch is Which" explains the different paths in the craft. An easy read and very informative from beginner to adept!

"Witches Goddess" has information on a wide variety of Goddesses. Great as a reference book or just as a good read in itself.

Yet another great book from the Farrars, full of great information and the brother book to "The Witches Goddess".