The Pet-Sitting Peril — Willo Davis Roberts

Nick is excited about the prospect of earning money by working as a pet-sitter for the residents of Hillsdale Apartments. After all, what could be easier than feeding cats and walking dogs?

But Nick isn't prepared for a strong-willed Airedale twice his size or a spitting, sharp-clawed cat named Eloise. And he definitely isn't prepared for the strange goings-on at Hillsdale Apartments -- including light bulbs that mysteriously burn out, gasoline stored dangerously near flammable materials, and two small fires.

It's not until Nick agrees to spend a frightening night alone in the building with the animals that he realizes exactly what's happening...and by then it's nearly too late.