Books I've read in the last few weeks (& recommend):

Shadow Divers by Robert Kurson
True story of wreck divers who find what appears to be a German U-boat. The book covers the search for proof that the wreck is in fact a U-boat, and gives history and information on diving, U-boats, and all of the people involved in the discovery and subsequent research.

Hiding the Elephant by Jim Steinmeyer
A history of magic, including some, but not all, of the secrets of some of the most successful magicians. The title comes from a trick Houdini performed that was never fully disclosed, but also never truly appreciated by his audiences.