The Gypsy Game — Zilpha Keatley Snyder

"What do you know about Gypsies?" With that simple question, April Hall and Melanie Ross begin a thrilling new game. Before they know it, the whole gang is in on it -- even Toby, who just has to steal the show by claiming to be a real, live, authentic Gypsy. The game is great fun at first. Toby brings real Gypsy jewelry, and his artist father paints a lifelike Gypsy caravan to help turn the storage yard into a Gypsy camp. Too bad no one can get along for more than a few minutes at a time. Then Toby starts acting very strange, and on New Year's morning he disappears. Soon the new "Gypsies" are involved in a crisis no one could have imagined, and the kids discover that what seems like fun in a game may not be so entertaining in real life.