The Queen of Salt and Ruin

Sorrel is the last queen of a drowned kingdom, and she has one plan left: marry the son of the man who flooded it, sleep in his bed, and kill him there. Cassian is a king-in-waiting of a country dying of thirst, and he has one advantage Sorrel doesn't know about — every book on her homeland that his father ordered burned is hidden beneath his floor, and he has read all of them. He offers her something worse than revenge. He offers her a real alliance, on his terms. Six months of playing bride turns into a slow, salt-stung partnership that neither of them meant to build, and the knife under Sorrel's pillow grows heavier every month. When a shared enemy exposes her plan to both courts, both kingdoms call for her head. Cassian doesn't. And when the water comes for his throne, it comes because she asked him to let it. A dark enemies-to-lovers fantasy romance of tide and throne.