Cole, Kresley. Immortals after dark series.

"In this pulse-pounding Immortals After Dark tale, #1 New York Times bestselling author Kresley Cole delves into the darkest mysteries and deepest passions of Clan MacRieve. A beast in torment Uilleam MacRieve believed he'd laid to rest the ghosts of his boyhood. But when a brutal torture revives those ancient agonies and destroys his Lykae instinct, the proud Scot craves the oblivion of death. Until he finds her--a young human so full of spirit and courage that she pulls him back from the brink. A beauty in chains seized for the auction block, Chloe Todd is forced to enter a terrifying new world of monsters and lore as a bound slave. When offered up to creatures of the dark, she fears she won't last the night. Until she's claimed by him--a wicked immortal with heartbreaking eyes, whose touch sets her blood on fire. A full moon on the rise with enemies circling, MacRieve spirits Chloe away to the isolated highland keep of his youth. But once he takes her to his bed, his sensual mate becomes something more than human, evoking his savage past and testing his sanity. On the cusp of the full moon, can he conquer his worst nightmare to save Chloe...from himself?"--

"The sizzling next installment in Kresley Cole's New York Times bestselling IMMORTALS AFTER DARK series, featuring the immortal inhabitants of The Lore, from Vampires to Lykae, from Furies to Shifters, from the Fey to Valkyries"--