Why Does the World Exist? by Jim Holt. The author interviews scientists and philosophers, theist and a-, and the author John Updike, in pursuit of an answer. Holt is earnest, unprejudiced and clear without being cutesy. I am halfway through and I suspect there will be no answer, but the quest is engaging.
Bonus: a great cover (a black and white shot of closing time at the Cafe de Flore, the old existentialist haunt).
N.B.: I know Holt, who once told me of a conference on linguistics he attended. A speaker was saying that while the double negative is a common affirmation in many languages, the double affirmative is nowhere used as a negation. From the hall came a world-weary Noo Yawk voice: “Yeah, yeah.”