Hand, Hand, Fingers, Thumb (Bright and Early Books/Bright and Early Board Books/Big Bright and Early Board Books, 1969) — illustrated by Eric Gurney
The Nose Book (Bright and Early Books/Bright and Early Board Books/Big Bright and Early Board Books, 1970/2002) — illustrated by
Roy McKie/Joe Mathieu
Tubby and the Lantern (Beginner Books, 1971) — illustrated by
Rowland B. Wilson
Tubby and the Poo-Bah (Beginner Books, 1972) — illustrated by Rowland B. Wilson - His final work before his death.
The Big Red Book of Beginner Books (Beginner Books, 1995) - with Joan Heilbroner, Marlin Sadler, Mike McClintock,
P.D. Eastman and
Robert Lopshire, illustrated by Robert Lopshire, P.D. Eastman, Eric Gurney, Roger Bollen and Fritz Seibel
My Big Book of Beginner Books about Me (Beginner Books, 2011) - with Dr. Seuss and Graham Tether, illustrated by Dr. Seuss, Joe Mathieu and Sylvie Wickstrom
The Big Aqua Book of Beginner Books (Beginner Books, 2017) - with Dr. Seuss and Robert Lopshire, illustrated by Eric Gurney, Dr. Seuss, Art Cummings and Robert Lopshire - His final work after his death in 1975.