This book list is a good starting point. I recommend checking out as much as you can at the library first and seeing what appeals to you and which ones you might want to add to your book shelves.
Drawing Down the Moon
Wicca: A Guide for the Solitary Practitioner.
Living Wicca: A Further Guide for the Solitary Practitioner.
A Witch Alone: Thirteen Moons to Master Natural Magic
Solitary Wicca for Life: Complete Guide to Mastering the Craft on Your Own
Wicca For Beginners: Fundamentals of Philosophy & Practice
The Spiral Dance: A Rebirth of the Ancient Religion of the Goddess
Janet & Stewart Farrar
A Witches’ Bible: The Complete Witches Handbook.
The Witches’ Way: Principles, Rituals and Beliefs of Modern Witchcraft.
Eight Sabbats for Witches.
The Witches’ God: Lord of the Dance.
The Witches’ Goddess: The Feminine Principle of Divinity.
The Pagan Path: The Wiccan Way of Life.
Janet Farrar and Gavin Bone
The Healing Craft
Gerald B. Gardner
The Meaning of Witchcraft
Another good list can be found here: Recommended Reading for Seekers (Paganism, Wicca, Witchcraft)