My boys recently discovered and read the book "Sir Fartsalot hunts the booger" by Kevin
Bolger. They thought it was quite a hoot. It's geared to approx 9-12 year olds. It's full of potty humor, but it also has some clever lines. Here's the description from the back of the book: Sir Fartsalot is on a quest to defeat a villain most foul. Something stinks in the kingdom of Armpit. King ...