Aliens attacked Earth, and Leo had no idea. He may or may not have been out in the woods skipping class. When he returns to town only to find it's been evacuated, Leo realizes he's in bigger trouble than just missing school. With no way to contact his parents and no idea where they went, Leo will have to rely on his instincts--and the help of some new friends he meets along the way--to get out of the town he's been stranded in.
I liked it until the end, which is left totally up in the air. The other books in the series don't appear to continue the story. I think it's going to frustrate my students.