Blood Seeker by Lexi C. Foss — book slip

Seraphim do not feel. Seraphim do not love. Seraphim do not react. Those are the rules every higher being lives by. And Caro broke them all for him.

Now she’s lost in a vacant sea, punished for the ultimate sin of choosing an abomination—a vampire—over her duty. Sethios promised to come for her, to find her, to save her, but with each passing breath, her hope melts into despair.

Will he find her in time? Or will her mind shatter from the madness? Welcome to the Immortal Curse world. The High Council of Seraph will see you now...