The Trial of Cyrhision is a fantasy series set in the British Isles as it was ten thousand years ago or rather, as it ought to have been.

Trial of Cyrhision Book 1: The Darkling and The Lady
In pristine lands now lost beneath the sea, ancient races with supernatural powers are locked in battle. Caught up in this conflict are Holt Goodfellow, a young farmer; Amrielle, the High King's enchanting daughter; and Rillodan, a once-powerful immortal who is just a little crazy... A chance meeting changes the course of Holt's life. Recruited as guard to the King's daughter, he pursues without hope when she is abducted. Facing her fearsome captor, he sets in motion forces of love and hate, enmity and devotion that will shape their future, and the fate of all the Nine Realms.

Trial of Cyrhision Book 2: The Quest
'The Trial of Cyrhision' is a fantasy series set in the British Isles as it was ten thousand years ago--or rather, as it ought to have been. In pristine lands now lost beneath the sea, ancient races with enhanced powers battle for supremacy. Embroiled in this conflict are Holt Goodfellow, a young farmer; Amrielle, the High King's enchanting daughter; and their friend Rillodan, a once-powerful immortal who is just a little crazy... In Book 2, "The Quest", Holt accepts an apparently futile mission, which leads him to uncharted northern lands, close to the Ice and too close to his enemy's stronghold. This time, not even his immortal friend can help him... While Holt battles, Amrielle has troubles of her own. With Rillodan, she forms a scheme to break the King's obstinacy. But if they succeed, will Rillodan be in time to rescue Holt? And even if he does, can Holt survive?