Sorcerous - Rise of the Charioteer Series, #1

A powerful sorceress. A cursed knight. A cryptic prophecy   Padric thought his recent assignment as lieutenant knight of quiet Chaddesden, Derbyshire, would be easy enough to manage. That is, until villagers disappear under mysterious circumstances, and the task falls on Padric to find them. However, his investigations become complicated when he receives a cryptic prophecy charging him to rescue the villagers and find a missing artifact before the solstice.  As though that weren't enough, days later, the mastermind behind the chaos is revealed: a powerful sorceress.
Their encounter leaves Padric cursed, transformed into a creature out of ancient Roman mythology.  To reverse the curse and rescue the villagers, he must find the sorceress's so lair, but there is more at stake than their safety-the entire world will be in grave peril if he doesn't reach them in time.