Lionheart (Moonshadow #3) by Thea Harrison is $1.99. So far it's an Amazon only sale.
Amazon US
Spoiler:
King Oberon reigned over his Dark Court in Lyonesse for centuries until an assassination attempt laid him low. Now he lies unconscious in his snow-bound palace while his Power battles the enchantment that threatens to end his life.
A skilled trauma surgeon and magic user, Dr. Kathryn Shaw reigns at the top of her profession in New York. Then comes a challenge she can’t resist—she is asked to cure the incurable. Just getting close enough to try healing Oberon is a dangerous proposition. When she does reach him, he awakens too soon.
Roused from darkness by Kathryn’s presence, Oberon confronts the beautiful stranger who claims she wants to save his life. But the enchantment has frozen his emotions. How can he learn to trust her when he can’t feel anything?
Oberon’s desire is icy, devoid of all tenderness. Not only must Kathryn match wits with him, she must also fight her reaction to his touch, because there is so much more at stake than her own endangered heart.
For the Dark Court faces its most deadly peril yet. Its ancient enemy Isabeau, Queen of the Light Court, is obsessed with its annihilation, and Oberon must be brought to remember his loyalty and affection for his people.
Because if he won’t fight for them, Lyonesse itself may very well be destroyed…