Heroes of Abraxas
by K. Osborn Sullivan
World of Abraxas Series: Book Two
When David Stanhope and his sister Amanda unearthed a mysterious ruby in their family's attic last summer, it launched them on the adventure of a lifetime. A year later, they're back home, trying to lead normal lives. Until one day a knock at the door forces them back into dangerous power struggles in the magical world of Abraxas.