Book 1

Pingo

by Brandon Mull

Published 5 August 2009
Teased by his friends for having an imaginary playmate, Chad tries to bid Pingo farewell but Pingo refuses to leave.

Book 2

When Chad and his friends hold a competition to see whose imaginary friend is the best, the schoolyard bully says his is the best, but in the end everyone learns the true power of friendship.