The Clackity / Lora Senf ; illustrated by Alfredo Cáceres.

Enhanced descriptions from Syndetics:

Reminiscent of Doll Bones and Small Spaces , this "delightfully eerie" (Erin A. Craig, New York Times bestselling author of House of Salt and Sorrows ) middle grade novel tells the story of a girl who must rescue her aunt by entering a world of ghosts, witches, and monsters to play a game with deadly consequences.

Evie Von Rathe lives in Blight Harbor--the seventh-most haunted town in America--with her Aunt Desdemona, the local paranormal expert. Des doesn't have many rules except one: Stay out of the abandoned slaughterhouse at the edge of town. But when her aunt disappears into the building, Evie goes searching for her.

There she meets The Clackity, a creature who lives in the shadows and seams of the slaughterhouse. The Clackity makes a deal with Evie to help get Des back in exchange for the ghost of John Jeffrey Pope, a serial killer who stalked Blight Harbor a hundred years earlier. Evie reluctantly embarks on a journey into a strange otherworld filled with hungry witches, penny-eyed ghosts, and a memory-thief, all while being pursued by a dead man whose only goal is to add Evie to his collection of lost souls. Will she ever find Des, or is The Clackity planning something far more sinister?