Claws is the 1st book in the Goosebumps Hall of Horrors series.
Synopsis[]
Mickey Coe is in charge of their vacationing neighbor's cat, Bella. His best friend, Amanda, comes along to help out. All they have to do is make sure she has enough to eat and does not destroy the house. Seems simple enough. But Bella escapes from the house and is hit by a truck. Mickey feels awful. Amanda has an idea to replace the cat with a look-alike from the local pet store, Cat Heaven. They find a cat that looks exactly like Bella, but the clerk will not sell it to them. So they decide to steal it. Big mistake! These cats are more what they seem to be...