Written by Jodie Shepherd
Illustrator Christopher Moroney
Published 2007
Publisher Reader's Digest
ISBN 0794412327

Big Bigger Biggest is a 10-page board-book by Jodie Shepherd, with illustrations by Christopher Moroney.

Elmo and friends headed to the zoo, where they have fun recognizing sizes and spatial relationships in the exhibits. Large, fold-out flaps illustrate concepts like long, longer, longest, and high, higher, highest. Each scene also includes animal facts on the animals pictured and an activity kids can do at home to reinforce the relationship shown. Characters include: Elmo, Zoe, Big Bird, Grover, Cookie Monster, Count von Count and Rosita.

The book also comes with a tear-out growth chart.