Written by: Dawn McMillan.

Illustrated by: Ross Kinnaird.

A young boy suddenly notices a big problem — his butt has a huge crack! So he sets off to find a new one. Will he choose an armor-plated butt? A rocket butt? A robot butt? Find out in this quirky tale of a tail, which features hilarious rhymes and delightful illustrations. (From GoodReads.)

Credit: Facebook discussion on Inappropriate / Gross Out / Butt storytime books.