From the publisher:

Meet best friends Fred (Big Dog) and Ted (Little Dog) in P. D. Eastman’s classic Beginner Book. Though one is big and one is little, and one loves green and one loves red, these pup pals—along with their helpful acquaintance Bird—prove that opposites can be the very best of friends.

Originally created by Dr. Seuss, Beginner Books encourage children to read all by themselves, with simple words and illustrations that give clues to their meaning.