The Eye of Leviathan

From the author of The Mask of Mirrors comes a sweeping adventure set in a world where fae secretly walk amongst those who seek to persecute them. In an alternate Spanish Golden Age, the Council of the Sea Beyond has risen to unrivalled power, exploiting the Otherworld's most precious resources for their own gain. Estevan seeks to uncover their secrets, but he risks the exposure of his own: that he is a faerie, masquerading as a mortal.
The Hungry Girl is the human whose place he took. Lost among the fae and desperate to find some purpose for her existence, she leaps at the chance to help a group of Spanish explorers in the Sea Beyond...only to be horrified at the atrocities they commit. A faerie pact has separated them - but only together can they bring down Spain's worlds-spanning empire and save the homes they have both come to love.