The Fall of Babel : Book Four of the Books of Babel Bancroft Josiah (2021)

As Marats siege engine bores through the Tower, Senlin can do nothing but watch the chaos from inside the belly of the beast. Edith and her crew are forced to face Marat on unequal terms, with Senlin caught in the crossfire, while Adam attempts to unravel the mystery of his fame inside the crowning ringdom. When the Bricklayers true ambition is revealed, neither the Tower nor its inhabitants will ever be the same.