Deinonychus - Definitely Dinosaurs Author:Mary Packard, Bill Hartman (Illustrator) Cavemen Thrax, Zindar and Druze share tall dinosaur tales around the campfire, trying to outdo each other, when the conversation turns to Dragar, a Deinonychus - one of the scariest dinosaurs to ever live. That night, on his way home, Druze comes face to face with that very dino and lives to tell the tale... but will his friends believe him?