The Sins of Scripture: Exposing the Bible's Texts of Hate to Reveal the God of Love by John Shelby Spong. The Bible contains many passages that believers and nonbelievers alike would recognize as appalling theology. Whether these texts are used to discriminate, oppress, or condemn, they distort the truth of Christianity and cast doubt upon the love of God.
Wicked Women of the Bible by Ann Spangler. The stories of these women of the Bible reveal a God who is not above it all but who stoops down to meet us where we are in order to extend his love and mercy. http://www.amazon.com/dp/031034168X/ref=cm_sw_r_pi_dp_X6QMwb14DX88S
Understanding the Bible: An Introduction for Skeptics, Seekers, and Religious Liberals by John Buehrens. A thoughtful, warm, and witty introduction Understanding the Bible is designed to help empower skeptics, seekers, nonbelievers, and those of a liberal and progressive outlook to reclaim the Bible from literalists.
A History of God: The 4,000-Year Quest of Judaism, Christianity and Islam by Karen Armstrong. Traces the history of how men and women have perceived and experienced God, from the time of Abraham to the present.
Don't Know Much About the Bible: Everything You Need to Know About the Good Book but Never Learned by Kenneth C. Davis, With wit, wisdom, and an extraordinary talent for turning dry, difficult reading into colorful and realistic accounts, the author brings the world of the Old and New testaments to life as no one else can. Relying on new research and improved translations, Davis uncovers some amazing questions and contradictions about what the Bible really says.