my teacher is an alien by bruce coville

Its about this new guy that comes in to the school the original teacher is not here. the new teacher mr.smith is been acting a little weird. Susan has a funny feeling about him. So she decides to follow him home after school. After susan sees that mr smith take his mask off susan is prooved that mr.smith is an alien. So susan tells peter the class brain because she is the only one she can trust and belive. So they both decide to go back during school so mr.smith is not there and they go to the attic and see the original 6th grade teacher ms.schwartz. she tells them that broxholm/mr.smith is going to take 5 kids. They have to warn them before they take the kids. At the end broxholm takes only peter because he is the smartest one. -Sahil