His Witch To Keep (Keepers of the Veil)

Serenity Danssaert was already in way over her head. Not even her MI6 training or her powers as one of the seven Pleiades witches is going to save her sister. Then Alexi Jovec shows up. A secret operative working for unknown forces, he's impossibly sexy and dangerous...and the guy who bailed on Serenity after a red-hot, racy night.

So bonding to him as her destined—the One—is so very wrong.

While Alexi’s need to own Serenity—body, soul, and beyond—is nearly unbearable, it's also forbidden. He's the last man who could ever be her destined. Besides, Hades's right-hand man cannot bond with a chosen Pleiades witch. He may be the one man who can protect her, but she can never be his to keep.