It is amazing. I was grabbed in the opening chapter. It is a murder/suspense thriller but it alludes to the works of Leonardo Da Vinci throughout. Mysterious facts about his Art and theories on religion. There are lots of codes to be cracked and you are left with a far more informed opinion on the changing face of religion. (Also, one could easily impress people with all the information one could give about The Last Supper and Mona Lisa)