From publisher blurb:
Far southeast of the Misland Republics lies the last true frontier of the Known Lands, the Misari Expanse. The ancient homeland of the Misari tribesmen, the Expanse is only partially explored and is home to dangers the likes of which have never been seen before on the mainland. The tumultuous seas that lie beyond it make it difficult to reach and impossible to pass, or at least so it has been for centuries. One day, the Cartographer's Society hopes, they will map the Expanse fully, uncover its secrets, and discover what lies beyond.
One of the many secrets of the Misari Expanse is the hidden stronghold of Mercato Belua, the last scion of the Belua legacy. Filled with a feverish desire to match his ancestors' achievements in creating the ferran race, Belua's experiments have come to dominate an entire peninsula of the Expanse where his greatest creation, the plant-based Florrans, have at least taken root.