The Casey Grimes Series: The Mostly Invisible Boy, Trickery School, Crooked Castle & The Ghost of CreepCat

Three full-length novels and a novella in one volume! This 4-in-1 collection is packed with adventure, courage, and of course, monsters. The Mostly Invisible Boy (Casey Grimes #1) Casey Grimes thinks his invisibility is permanent until he finds a secret forest society in charge of monster control. Now he’s got a chance to belong—if he can stay alive long enough. Trickery School (Casey Grimes #2) Monster-control academy starts for Casey & Gloria, but there’s one little problem: A secret enemy who’s playing for keeps. Crooked Castle (Casey Grimes #2.5) When Brook, an orphan with a knack for survival, is dumped on a deadly island—by a beast that shouldn’t exist—all she knows is she’s far from her group home in Weed, California. And haunted by a past that stays just out of reach. The Ghost of CreepCat (Novella) When Lila Banks takes a hike, she doesn’t expect to be stalked by the ghost of her recently-deceased cat. Compare : If you bought these books individually, you’d pay a minimum of $60.