Cinderella's fairy godmother turned a pumpkin into a coach, mice into horses, and rats into a coachman and a page. But what if the pageboy had run off to play with some of the palace children and so missed his ride back to Cinderella's cottage--and stayed in human form? A rat, shaped like a child, able to walk and talk but with a curious propensity for eating trash and chewing on wood, and of course, without any understanding of society, or how he ought to fit into it.
I think this is a social commentary more than a book for children. It's interesting, certainly, and the boy's adventures are exciting enough. But there's not a lot of characterization, and the newspaper articles the pop up--I'm not sure how much of them actual children would understand.