Prophecy's Heirs

When King Conrad of Arualia is struck down with a deadly poison, his three children must go on a quest to save him by climbing over the edge of the world, using as their guides a prophecy given by an ill-reputed pseudo-historian and a map of unknown origins. In a race against time, they will meet creatures of myths and legends, as well as Aaron, a peasant boy also searching for the cure. The four children learn of long forgotten secrets and ancient history that may just help them unravel the clues in the prophecy if they hope to save their father and the kingdom. But will they be able to find it in time? Who will ultimately become the Prophecy's Heirs?