There are many good books and there are many not so good books. Take what speaks to you and belay the rest. For our religion isn't in a book, but within our hearts and nature around us. Take a walk in the woods or across a field, stand on the water's edge...there you will find Wicca. In those places magick is revealed every day with every sunrise and every sunset. You will feel the energy rise, the elemental forces, the Lord and Lady, the mysteries.
Beginner Reading: Starhawk's Spiral Dance. This book is an Excellent overview on Wicca and touches both the Elder and Neo Wiccan Paths. The exercises included in the book are wonderful for beginners to find their inner power.
Intermediate Reading: The Wiccan Mysteries by Raven Grimassi. This is a more advanced reading and is more in depth on history and background.
Wiccan Magick, by Raven Grimassi. This book allows you to find the core of Ceremonial Magick and helps the reader to put more power into their magick.
Ways of Strega, by Raven Grimassi. Although, Stregheria was taught orally from generation to generation (passed from family member to family member) this book gives a comprehensive, overall view of Stregheria and the Gospel of Aradia, tool making, and Rites.
Circle Round, by Starhawk, Diane Baker Anne Hill. This book is excellent for those who are teaching the Goddess Traditions to their children. It has wonderful stories, crafts, questions and answers, rituals for children, Blessings and Rites of Passage.
Encyclopedia of Wicca & Witchcraft, by Raven Grimassi. One of the most comprehensive reference books I have ever seen. A "must have" in any collection.