Witch: A Personal Journey - A great book for begginers with heaps of usful references for you to continue exploring. And a damn good read even if your not a begginer. Written by Australia's own Fiona Horne who is a Journalist, Novelist and "Rock Goddess" singer from the band DefFX
Witchcraft: A Tradition Renewed - Written by Doreen Valiante and Evan Jones - Great book that mainly focuses on coven work, tools, the four great Sabbats and goes a little into explaining the history and myth of witchcraft in the past and how it's changed up to the present day.
What Witches Do - Written by Stewart Farrar - This is another great book that tries to dispell the usual myths about witchcraft. Also looks at coven work in the Alexandrian tradition. Stewart Farrar is a witch who had worked with Alex Sanders the founder of Alexandrian Wicca.
The Ritual Magic Workbook - Written by Dolores Ashcroft-Nowicki - This book is actually intended for would be Magicians but I can not help but recommend it as there are many similarities between Wiccan work and Magicians work. Simply alter the required sections to fit you own beliefs. This book is basically about getting you into a habit of doing your own rituals, meditations etc. each day for up to one year.