Aliens, sassy hedgehogs, and unexplained disappearances . . . Oh, my! When Sky Patel-Baum is sent to live with her mysterious uncle, she didn't imagine she'd end up here: Area 51. A top-secret military base with a bajillion rules and so classified not even the President knows its secrets. Also, it turns out the place is full of aliens. Lots and lots of aliens. But they prefer to be called Break Throughs, thank you very much. As Sky sets out to explore her extraordinary new home with her pizza-obsessed pet hedgehog Spike, she meets her otherworldly next-door neighbor Elvis and his fluffy pup, Pickles. But something mysterious is afoot in Area 51. Some of the Break Throughs have gone missing... at the exact same time Sky arrived. Where could they be? How can Sky and her uncle convince everyone they had nothing to do with the disappearance? And why does the macaroni and cheese at Area 51 Middle have eyeballs in it? New best friends Sky, Elvis, Spike, and Pickles try to crack the case, but the clock is ticking...

Sky and her friends tackle their biggest mystery yet—the discovery of Area 52!—in the third installment of this laugh-out-loud, highly illustrated middle grade series by New York Times bestselling author Julie Buxbaum, illustrated by Lavanya Naidu. Sky’s life in Area 51 is full of surprises. Like the fact that aliens are real—and now one is her best friend! But the biggest surprise yet comes when Sky learns that her grandmother has been kidnapped and is stuck in Area 52, the only other alien portal on Earth. Even more bananas? Her grandma has been an undercover FBAI agent for YEARS. Like Sky’s whole entire life. How could Sky not have known her grandma had a secret identity? Uncle Anish says to leave this whole mess to him. For reals this time. The kids just have to hang tight. Spoiler The kids do not, and will never, hang tight. There’s just one No one knows the location of Area 52. In order to solve this mystery and save Sky’s grandma, Sky and her friends will have to solve a series of secret puzzles and codes, traverse the Area 51 library for clues, break into FBAI headquarters, and more. But someone doesn’t want Sky to solve this mystery, and they’ve got their eyes on her…