In the Wake of the Ruined by Kalie Cassidy

Leucosia has gained a new queen... and a new monster.

King Nemea is dead by Imogen's own hand, leaving Eusia with one less devoted servant-but the deity's strength has only grown.

Now, she can access Imogen's power freely, and what's worse, Imogen's first taste of Eusia's grotesque magic has left her hungry for more. Meanwhile, Theodore's wedding to Halla is imminent, and Imogen plans to steal his bride and use her to get to the blighted island where Eusia's body resides. But the journey proves more difficult and the waters more treacherous than she could have imagined, tempting Imogen to descend into her magic's darkness.

As she fights to balance her feelings for the handsome king with her mission, and draws nearer to severing her bond with Eusia, Imogen realizes that ending Eusia might cost her more than she had ever planned on giving.