Prophecy's Heirs

Three children must go on a quest to find a cure to save their father 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. Along the way, 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 and provide a way to find the cure. But will they be able to find it in time? Who will ultimately become the Prophecy's Heirs?