Dinosaurs: The Most Complete, Up-to-Date Encyclopedia for Dinosaur Lovers of All Ages / Dr. Thomas R. Holtz Jr., Luis V. Rey,

An award-winning encyclopdia written for young people—dubbed the "Dinosaur Bible" by enthusiasts!

Written by one of the world’s foremost experts on dinosaurs, this award-winning title—honored by the NSTA and the AAAS—is an essential addition to any dinophile’s library, regardless of age! Using casual language aimed at young people and non-scientists, it's a guide to all aspects of dinosaur science: how we figure out what dinosaurs looked like, how they lived, how they evolved, how they continue to live among us as birds, and much, much more. 

It also includes brief entries on all 800+ "named" species of Mesozoic dinosaurs, as well as sidebars by 33 world-famous paleontologists—among them Robert T. Bakker, Jack Horner, Mark Norell, Scott Sampson, and Philip Currie. With 428-pages of lavish, museum-quality illustrations, and an exhaustive Web site maintained by the author of supplemental chapter updates, this the perfect gift that will educate AND entertain for many, many, MANY hours! (And if that isn’t enough, the jacket has a spectacular poster printed on the inside.)
 
“Written in a casual language both young and adult paleo-nerds will find readable and enjoyable, this volume is seen as the "Dinosaur Bible" by many enthusiasts of the subject, for its sheer completeness and scienciness.” —tvtropes.org