Karl Kwasny
Nightmares! The Lost Lullaby
Jason Segel and Kirsten Miller; illustrated by Karl Kwasny
Everything You Need to Know About NIGHTMARES! and How to Defeat Them
Jason Segel and Kirsten Miller; illustrated by Karl Kwasny
Nightmares! The Sleepwalker Tonic
Jason Segel and Kirsten Miller; illustrated by Karl Kwasny