Terror in Tiny Town (Deadtime Stories #1) by A.G. Cascone - Vintage Paperback

Hurley's the leader of the pack. A very nasty pack.

Willy and Zach love their Tiny Town train set but when the boys add a new toy, weird things begin to happen. The toys aren't where they were left and the Tiny Town train runs by itself. Is it possible Tiny Town has come to life?