HarperCollins has a few interesting books on sale right now for $1.99.
By Bruce Feiler:
Walking the Bible: A Journey by Land Through the Five Books of Moses
B&N eBooks.com Amazon
Abraham: A Journey to the Heart of Three Faiths
B&N eBooks.com Amazon
Feiler's not exactly a theologian, but he is a good storyteller.
Walking the Bible has been on sale a number of times before, but this is the first time I've seen
Abraham.
Mind of the Raven by Bernd Heinrich
B&N eBooks.com Amazon
A Garden of Marvels by Ruth Kassinger
B&N eBooks.com Amazon
I included the ebooks.com link in case someone likes PDFs. The first three of the four are available as both epub and PDF with the same purchase at ebooks.com.