M for Mischief Paperback – 1975 by Richard Parker (Author)
A magic stove! Andrew and his sisters can hardly wait to try it. Carefully, they set the stove dial to M. Then Andrew cooks an egg and eats it. "You're supposed to disappear!" wails Milly. "I knew it wouldn't work," Andrew says. "Nothing's happened. I don't feel any different at all ..." But before he can finish speaking, Peg calls out in a frightened voice: "Andrew! Where are you?"