Quicksilver

Saeris Fane is good at keeping secrets. No one knows about the powers she possesses, or the fact that she has been stealing from the Undying Queen's reservoirs for as long as she can remember. But a secret is like a knot. Sooner or later, it is bound to come undone. When Saeris comes face-to-face with Death himself, she inadvertently reopens a gateway between realms and is transported to Yvelia, a land of ice and snow.
The Fae have always been the stuff of myth, of legend, of nightmares... but it turns out they're real, and Saeris has landed in the centre of a centuries-long conflict that might just get her killed. The first of her kind to enter Yvelia in over a thousand years, Saeris mistakenly binds herself to Kingfisher, a handsome Fae warrior with an agenda of his own. He will use her powers to protect his people, no matter what it costs him ...
or her. Death has a name. It is Kingfisher of the Ajun Gate. His past is murky. His attitude stinks. And he's the only way Saeris is going to make it home.