Lord John Aversin--with the help of his mageborn wife, Jenny Waynest--has fought and defeated two dragons, earning the title of Dragonsbane. But there are creatures more terrifying than dragons. Demonspawn from a dark dimension have learned to drink the magic--and the souls--of mages and dragons alike, turning their victims into empty vessels. And now they've stolen John and Jenny's mageborn son, twelve-year-old Ian. In desperation, John seeks...