Tracking Tyrannosaurs: Meet T. rex's fascinating family, from tiny terrors to feathered giants (National Geographic Kids)

This is a great up-to-date book on the Tyrannosaurus and its family tree. Full of excellent full-colour illustrations, size charts, maps and detailed information for the budding paleontologist in your family. It follows the Tyrannosaurs through the ages from Eotyrannus (found in the U.K.) through to the Yutyrannus (the feathered giant, found in China in 2011). It also discusses the first discoveries of T-Rex. An interesting book for anyone interested in the subject matter.