Beware what lurks beneath your bed. . . . It could lead to a monstrous adventure.

Thirteen-year-old Lissa Black is miserable when her parents force her to move from New York City (the perfect home for an aspiring writer/director/actress) to Freeburg, Pennsylvania, nowhere capital of the world. There's nothing to do there, except play her little sister Haylie's favorite new game, Monsterville, and hang out with her new neighbor Adam.

But when a walk in the woods lands her face-to-face with a swamp monster hungry for brains and then a Sasquatch that moos, even Lissa can't call her new home totally boring. With Adam's help, she catches the culprit behind the drama: a shape-shifting goblin who's fled from the monster world of Down Below.

And what do you do with a creature that can be literally anything? Make monster movies, of course! Lissa is convinced that Blue will be the secret to her big break.

But when Haylie goes missing on Halloween, Lissa, Adam, and the monster must venture Down Below to stage a rescue-and face the real Monsterville, which is anything but a game.

Monsterville is a fusion of The Boxtrolls, Jumanji, and Candyland, weaving together friendship, family, and monsters into a funny fantasy-horror brimming with heart from a great new middle grade voice.