The Hollow Places

Carrot has moved into the Wonder Museum -  an eclectic collection of taxidermy, shrunken heads, and Mystery Junk owned by her Uncle Earl. For Carrot, it's not creepy at all: she grew up with it. What's creepy is the corridor behind one of the museum walls. There's just no space for a corridor there — or the concrete bunker, or the strange islands beyond the bunker's doors, or the unseen things  in the willow trees.
Carrot has stumbled into a horrifying world, and They are watching her. Strewn among the islands are the remains of Their meals — and Their experiments. And even if she manages to make it home, she can't stop calling Them after her…