BOOK 1 OF THE STAR KEEPERS SERIES: Cynthia and Landon are normal teen siblings- that is until four strange people come to take them back to a place called the Star Realm. The strange beings introduce themselves as Star Keepers called Scorpius, Pegasus, Orion, and Corvus. They represent the constellation they're named for, and they tell Cynthia and Landon their real names are Cygnus and Lupus, and they, too, are Star Keepers. Now they must work together to take down the one who means to destroy all Star Keepers: Hydra.