Osborne, Will. <br/><br/>
Dinosaurs: A Nonfiction Companion to Magic Tree House #1: Dinosaurs Before Dark. 

 - 128  p. 
<br/><br/> Dinosaurs: A Nonfiction Companion to Magic Tree House #1: Dinosaurs Before Dark by Will Osborne (2000) 
<br/><br/><label>ISBN: </label>0439241227