Query - The Brigid

In this 80,000 word urban fantasy, The Brigid, one man's lack of faith in his unseen heritage may be the weakness that destroys the entire world, starting with those closest to him.
They are brothers. Twins. They live in the white world, but a piece of them belongs to their mother's people, the Nez Perce. CALEB accepts that piece of himself, but MIKA's doubts haunt him. Does he really have a spirit guide, or is the voice he hears in his head merely intuition?
Into their lives comes a beautiful woman with no memory and frightening enemies who stretch the brothers' credulity—the beautiful but terrifying creatures she says are Tuatha de dannan. Her friends, like the wee man who smokes a dragonbone pipe and who just might be a leprechaun, are equally unbelievable.
In order to save not just the world of the mysterious stranger, who both brothers are starting to fall in love with, but their own world as well, Mika must learn to believe and Caleb must learn to see his own worth outside of his brother's shadow.