What a cool concept! I love the whole idea of releasing books into the wild, opposed to selling them for a quarter in a yard sale, donating them to Goodwill et al so they can rot on their shelves, or simply tossing them out. With a message and some intrigue associated therein, this is a wonderful way to spread great reading and broaden the world for someone else, as well as yourself.
As for me, I'm a teacher by trade who enjoys my wife, my children, playing the guitar, writing, meeting interesting and open-minded people, and lots of other things.