Although this book is evidently number 3 and I haven't read the first ones, I was able to pick up the situation pretty well. It's a fantasy about a Lord and Lady in Robert the Bruce's time who are actually from our time (I don't know why--must have been in previous books). The Lady is 1/2 Fae. She's kidnapped by a full Fae Lord who has had the hots for her since seeing her fight in previous books. Her husband sets out to rescue her and gets captured himself, along with his priest, and thrown in the Fae Lord's dungeon, grievously wounded. Luckily, although she sees him brought in, she doesn't give away his identity, knowing her captor would immediately kill him so she'd marry him instead. The Fae Lord feeds her a potion at meals so she unknowingly slowly becomes more attracted to him. The arrival of her estranged son to rescue her, and then a Fae King who is testing loyalties, complicate the situation.
It was a good story, that I liked. I liked the main characters and felt conflicted over the other characters who weren't so straightforwardly good or bad. There was nothing tedious or boring, and any confusing bits I ran across were just because I hadn't read the earlier stories. I like stories where the main characters have an enduring love and there are no gratuitous misunderstandings to cause conflict for the story line.
It stopped at a good point, not a frustrating cliffhanger, but there is obviously more to the story for a later book. I wish I had read the earlier books-the back story looks pretty interesting.