What is the author's style in Practical Demonkeeping: A Comedy of Horrors by Christopher Moore?

Moore uses clever language for humor throughout the novel, and also to reveal his characters' personalities. Moore's humor is mainly based on contrast, such as having Catch, the demon of destruction, using childish words like "jammies." The demon's use of childish language also marks him as un-intellectual, a trait that seems aligned with evil in the novel.