Slappy in Dreamland (Goosebumps SlappyWorld #16‪)‬

This is Slappy's world -- You only scream in it!Richard Hsieh's life is about to become a total nightmare. His dad studies dreams and they hook his new Slappy doll up to thedream machine as a joke. All of a sudden, Richard's dreams are becoming scarier and scarier. Each time, seeing Slappy, hisbirthday present, come to life and wreak havoc. But they're only dreams, right? When his cousin Willow comes to spend a fewdays with him, she, too, begins to dream of Slappy. It's impossible! But when Slappy threatens to invade more kids' dreams, they’llhave to figure out how to defeat him before he becomes a dream master.