Goosebumps Book 7 Night Of The Living Dummy

Lindy Games the ventriloquist's dummy she finds sloppy. Slap kind of ugly, he's a lot of fun. Lindy's having a great time learning to make Sloppy move and talk but Kris is jealous of all the attention her sister is getting. It's no fair. Why does Lindy always have all the luck? Kris decides to get a dummy of her own. She'll show Kris. Then weird things begin to happen. No way a dummy can be causing all the trouble or is there?