I usually recommend the following...
WICCA* Books by Gerald Gardner...
Witchcraft Today by Gerald Gardner
The Meaning of Witchcraft by Gerald Gardner
* Books by Doreen Valiente
* Books by Vivianne Crowley
*
Circle of Fire - Sorita D'Este & David Rankine
*
Fifty Years Of Wicca - Frederic Lamond
*
A Witches' Bible – Janet and Stewart Farrar
*
Lid off the Cauldron - Patricia Crowther
*
A Grimoire of Shadows - Ed Fitch
GOD AND GODDESS*
The Witches God and
The Witches Goddess – Janet and Stewart Farrar
SABBATS*
Ancient Ways: Reclaiming Pagan Traditions - Pauline Campanelli
GENERAL REFERENCE*
Elements of Ritual – Deborah Lipp
HISTORICAL REFERENCE*
The Triumph of the Moon - Ronald Hutton
*
Drawing Down the Moon - Margot Adler
*
Wiccan Roots - Philip Heselton
*
Her Hidden Children - Chas Clifton
_____________
In particular I like Circle of Fire (D'Este & Rankine) and
The Elements of Ritual (Lipp). Circle of Fire is fairly short and to the point, but is very good for basic information. Elements of Ritual, is one I think everyone should own - if they are wanting to know the how's and why's of ritual.