In the Shadow of the Goddess (Book 1 of The Fallen Gods Trilogy)

Abandoned on the side of the road by the man she no longer loves, Jill Logan never expects to be confronted by an angry goddess and ripped out of her own world. With no warning other than to make herself ready for the coming battle, she meets Prince Brexten of Dolmar, a dangerous stranger with demons of his own and bent on revenge.

Dropped into an alien world and bound to Brexten by magic she doesn't understand, Jill is swept into an ancient battle between powerful gods and a consuming evil that threatens to end Brexten's world. If she ever hopes to return to home, Jill must learn to master the power growing within her and face the darkness head on. If she can't, Brexten, his kingdom, and his entire world, are doomed forever.