Riddler's Fayre Book 1 - The First Matter. Steve Carroll

Aeden is young man with no memory, adrift in a world of riddles. His only friend – a man hated for his race and creed, their only hope – a nun on the run for opposing the Holy Wars. Meanwhile a veteran of the Third Crusade is hunting Aeden, believing him to be the clue to discovering the greatest secret in alchemy, the identity of the First Matter. Originally penned in the wake of 9/11, Riddler's Fayre is a series that has as much to say about our world today as it does the twelfth and thirteenth centuries.