This book reminded me vaguely of The Hitchhiker's Guide to the Galaxy, but for kids and a more two-dimensional. It's a quirky story about a scouting party of aliens who are supposed to prepare for the rest of the alien race to invade and conquer Earth. It wasn't a bad read.
Readers who enjoy aliens should get a kick out of the alien species that eats people with their tentacles. Readers who appreciate a little humor might enjoy Deborah's growth squirts (sorry) or the corpse-bridey wedding on Halloween. And of course, the universal theme of just wanting to do what everyone else is doing (in this case, eating a plain old hamburger instead of a human) would apply to most everyone.
Aliens. Potty humor.