A creepy children's fantasy novel about a precocious girl who finds a door that opens into an alternate bizarro world, where all the people she knows exist in parody, including her mother, father and neighbors.
Fresh and enjoyable, the novel/novelette is paced well, has a great main character and cast of quirky, fun, side characters and their strange and disturbing other-selves that made this an easy, quick read that I can recommend to almost anyone.
Despite being a children's story, it's worth a read for any fan of fantasy, or even just interesting fiction.
If you've read "Neverwhere" or "American Gods" and want more of Gaiman's work, you won't go wrong with this. Unfortunately, you'll be done in no time and probably wanting more.
The reason that I don't give it more stars is that it is so short, and I'd love it to be a full novel, rather than just a side project for Gaiman. I didn't think he gave it the attention it deserved. Still, it's well worth your time.