Yesterday I finished The Dangerous Book for Boys by Conn and Hal Iggulden. It's been a great book to poke through over the last several months. It's full of all kinds of fun things from knots to the Seven Wonders of the Ancient and Modern Worlds. I particularly enjoyed the series of extraordinary stories and great battles in history. I also look forward to using it as a base guide for building a tree house someday.
At the end is a list of books for boys that is a great idea starter for gifts...though I disagree with the recommended ages for most of the books - I think you could probably read The Lion, the Witch and the Wardrobe before you were 12.
I definitely recommend it for fun light reading or as a great gift no matter how old the boy.
Also available is The Daring Book for Girls.