The Book of Lies by Brad Meltzer. Grand Central Publishing (2008).
Brad Meltzer's The Book of Lies is a Dan Brown-esque religion-based mystery but with a pop culture twist. How he ever came up with the pairing of Superman and Cain, I'll never understand...but it works. While only loosely based in reality, Meltzer manages to weave a believable narrative from these two disparate stories. At the same time, the reader grows fond of the main character, Cal Harper, as he embarks on this odyssey with his long-lost father. This brings an emotional element to the story that only enhances their quest to discover the truth.
I am typically able to develop a pretty strong idea of how a mystery will end, but The Book of Lies kept me guessing to the very end. I rarely read an entire book in one day anymore, but this is an engaging novel that kept me going until I finished. I'm loathe to say more for fear of ruining it for you, so just go get this book and read it for yourself.