Dark Waters — Liia Ann White

Randor is a Fae assassin. As the most feared military officer in the Faery Realm, he only got out by striking a deal with the late King to become an assassin for hire.

When he's ordered to kidnap the Unseelie Faery Princess and deliver her to the Seelie Queen, he doesn't think twice, until he sees his target. Adora. Unseelie Princess. Most beautiful being in existence, feared witch warrior, and his soul mate. Disobeying orders is something he's never done before.

Adora was fearless, powerful, and intensely unhappy. Until she was kidnapped by a mysterious stranger, who happens to be her half-human, half-Seelie soul mate. When all hell breaks loose, they're involved in a fight that not all will survive.