Gena Showalter 
Darkest Surrender 

Strider Immortal Keeper of Defeat Nothing comes between him and victory Possessed by the demon of Defeat, Strider suffers unimaginable pain when he loses a challenge. For him, nothing stands in the way of winning. Until Kaia, an enchanting Harpy, tempts him. Kaia must bring home the gold in the Harpy Games competition or die.Strider is a distraction she can t afford, especially as he intends to steal first prize, an ancient magical artifact, before the true victor can be named. But as the competition heats up, only one prize will matter the dangerous, addictive passion neither had thought possible. . . .