Arm of the Sphinx : Book Two of the Books of Babel Bancroft Josiah (2018)

Forced by necessity into a life of piracy, Senlin and his eclectic crew struggle to survive aboard their stolen airship as the search for his lost wife continues. Yet the Tower of Babel proves as difficult to re-enter as it was to escape. Hopeless and desolate, they turn to a legend of the tower: the mysterious Sphinx. But the Sphinxs help does not come cheaply, and Senlin knows that debts in the Tower of Babel are not always what they seem.