This book is part of a book series called Which Came First? .

This book has been graded for interest at 7-12 years.

This book was published 2005 by Bearport Publishing .

Jacqueline Ball is the award-winning author and producer of more than 100 books for children and young adults, including the Dino School series and Step Back Science. She lives in New York City. Richard H. Levey is a business reporter and weekly columnist. His first children's book, Dust Bowl! The 1930s Black Blizzard, was published in 2005. He lives in New York City.