This series of terrifying standalone tales that combine monsters + mysteries is perfect for fans of Goosebumps.

Spine-chilling and creepy! -Max Brallier, #1 New York Times bestselling author of The Last Kids on Earth, on Escape From Grimstone Manor (Monsterious, Book 1)

Seventh grade scientists Rowan, Tinker, and Amari are thrilled to spend the weekend at a biosphere research facility in the Arizona desert, sealed off from the outside world to preserve its specially engineered ecosystems. The kids are surprised to discover an adorable baby animal in one of the lab's environments that doesn't look like anything they've ever seen in the wild, but when they ask the adult scientists about it, no one believes them, and now the creature is nowhere to be found.

Soon, strange things start happening: the kids discover what looks like a secret testing facility in the basement, one of the scientists suffers a mysterious injury that looks like an animal attack, and the lab's locking and communications systems break down, trapping everyone inside. And when the mystery creature appears again, it's not quite so cute and harmless anymore...