"Epically fun!"--Max Brallier, #1 New York Times bestselling author of The Last Kids on Earth

Sky Patel-Baum, Area 51's latest arrival, thought she had finally figured out her strange new home. Sure, there are aliens everywhere, and her new BFF Elvis is from the planet Galzoria. But it turns out things can still get weirder. Because some special visitors just arrived with a warning: Area 51 is in danger!

A hunk of space junk is headed right for the base! And it's not just any hunk of junk! It's a giant toilet! Even worse? A traitor on base is working with angry aliens to coordinate the attack.

With one case already under their belts, Sky and her friends are on a mission to save Area 51. But what happens if their investigation goes down the toilet? That would stink!