Cartooning Made Easy: Circle, Triangle, Square: Draw 30 people, places, and things using simple geometric shapes

Cartooning Made Easy: Circle, Triangle, Square: Draw unique cartoon characters using simple geometric shapes

Modern Cartooning: Essential Techniques for Drawing Today's Popular Cartoons (Christopher Hart's Cartooning)

The Master Guide to Drawing Cartoons: How to Draw Amazing Characters from Simple Templates (Drawing with Christopher Hart)