Of course this is something you read in about 2 minutes, but it is absolutely lovely.
Uhm... I loved the idea, and the story, but I didn't like the illustration, which is a huge drawback in an illustrated book.
Ok, it's not actually necessary to own this and it is precisely what you'd expect - a children's picture book taken directly from "Thud!". However, it's charming and well-illustrated and a curio for Discworld fanatics.