This is bizarre and I love it.

It isn't really child-appropriate (too scary) but it gives you the feeling of reading a kids book. It actually kind of reminded me of The Little Prince. 
I read it in about 25 min so it's definitely quick. The pictures are one thing I didn't really get lol- I saw that other people really liked them but it was like a kid picked stockphotos of something described in the book every few pages. But it added to the weird atmosphere I guess.
I really like this story and the characters. I think it goes second (to Killing Commendatore) in the fiction books I've read by Murakami so far.