"So now I know. My teacher's an alien. Even worse, he's come to earth to kidnap kids and taken them into space! At least I'm not alone - I've got Peter Thompson with me. I just don't know if that's comforting or worrying. For all his brains, Peter's never been much good in a crisis. But he's the only help I have and somehow we have to figure out a way to get rid of the alien before he takes off with the whole of our class. To be perfectly honest, I don't even know where to begin."
This is a fast, funny and frightening alien caper set in a US school. The story is narrated by Susan, the first kid to suspect that there are alien teachers in her school.