The Revolutions of Time - Jonathan Dunn

The Canitaurs, who believe that the past is the key to the future, and the Zards, who believe that the past is just the past, are at war and each believes that a redeemer will arrive and propel them to victory. What role Jehu, who has been summoned to the island of Daem, will play in stopping these hostilities is unclear but he soon learns that he will determine not just the outcome of the war but the fate of all humanity.