Game Series by Zilpha Keatley Snyder

The first time Melanie Ross meets April Hall, she's not sure they'll have anything in common. But she soon discovers that they both love anything to do with ancient Egypt. When they stumble upon a deserted storage yard behind the A-Z Antiques and Curio Shop, Melanie and April decide it's the perfect spot for the Egypt Game.Before long there are six Egyptians instead of two. After school and on weekends they all meet to wear costumes, hold ceremonies, and work on their secret code... moreThe first time Melanie Ross meets April Hall, she's not sure they'll have anything in common. But she soon discovers that they both love anything to do with ancient Egypt. When they stumble upon a deserted storage yard behind the A-Z Antiques and Curio Shop, Melanie and April decide it's the perfect spot for the Egypt Game.Before long there are six Egyptians instead of two. After school and on weekends they all meet to wear costumes, hold ceremonies, and work on their secret code.Everyone thinks it's just a game, until strange things begin happening to the players. Has the Egypt Game gone too far? less

The kids from The Egypt Game are back. What game will they play next? The answer is Gypsies. While April plunges in with her usual enthusiasm, the more Melanie learns, the more something seems to be holding her back. But it's Toby who adds a really new wrinkle when he announces that he himself is a bona fide Gypsy. Plus he can get them some of his grandmother's things to use as real Gypsy props for the new game... moreThe kids from The Egypt Game are back. What game will they play next? The answer is Gypsies. While April plunges in with her usual enthusiasm, the more Melanie learns, the more something seems to be holding her back. But it's Toby who adds a really new wrinkle when he announces that he himself is a bona fide Gypsy. Plus he can get them some of his grandmother's things to use as real Gypsy props for the new game. What could be more thrilling? Then Toby suddenly and mysteriously disappears, and the kids discover that living as real-life Gypsies may not be as much fun as they thought. How will they find Toby and rescue him from the very real problems that are haunting his life? less