Half Sword by Christopher Matson

SPFBO7

Simon the fool, Simon the halfwit, Simon the lost is pursued across medieval Europe by a sinister league of conjurers, the Apostles of Light. Having erased his past, they will stop at nothing to steal his future as well. On the way, he joins the Knights of Palermo, a dubious band of wandering rogues, and attracts a mysterious young woman whose fate is somehow interwoven with his own. Simon finds himself caught in a struggle for power between the shadowy Apostles, his adopted Knights, and a cabal of powerful women known to a select few as the Weavers. With only a broken sword and his own shattered memories, Simon must thread this maze of warring factions to discover who he was and why he is inexorably drawn to the haunted ruins of twelfth century Rome.