Nutcraft - The Climbing Nut Bible
There are plenty of books on the market that cover nuts and other passive gear, but non that focus completely on this important topic (the foundation of all climbing protection).
Nutcraft covers standard climbing nuts, micro wires, hexs, tricams and exotica (knots, beaks and natural chocks), as well as how best to use them.
This is a perfect book for a novice climber.