Navajo Courage

Like a cougar on the hunt, Tribal Officer Luca Nakai was one with the wild-steady, steely and fierce. Nothing like the cops Detective Valerie Jonas was used to. He didn't carry the usual accessories, but he was a more formidable force than she'd ever seen. Not to mention gorgeous. They were on the trail of a dangerous skinwalker who'd killed twice before and was pursuing another victim. Luca's Navajo ways were invaluable to the investigation and casting a spell over the no-nonsense Valerie, who'd never believed anything but hard facts.
So how could the mystery and magic of this quiet man single-handedly be cracking her protective shield right along with the case?