Senlin Ascends (Book 1 in the Books of Babel) is available as a paperback, audiobook, and e-book:

Arm of the Sphinx (Book 2 in the Books of Babel) is available as a paperback, audiobook, and e-book:

The Hod King (Book 3 in the Books of Babel) will be released in December 2018. Preorders available in April.