Siren's Kiss — Margo Bond Collins

Her kiss might save the world . . . Unless his kiss kills her first. It's been almost two thousand years since the mer-shifter Skyla walked the streets of Athens -- not since her heart was broken by a human man and she exchanged the land and sky for the ocean depths. Ever since, she has lived in the underwater ruins of Atlantis, studying with the priestesses of the goddess Amphitrite, refining her mermaid powers and ignoring her human half. But her studies are interrupted when she is called upon by Poseidon himself to investigate rumors that the world above is being polluted by the magic of creatures from another realm -- and worse, that the ocean kingdom of the mer-people might be next. When her arrival in modern-day Greece leads her to an American detective, Skyla realizes that the magical problem she's been sent to research is bigger than she anticipated -- and that one human's kisses might be more dangerous to her, and her world, than she ever could have imagined.