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?