As mentioned by Cotgrave in this Descent thread, there is a new novel set in the Terrinoth word which is set for release in October. Could be some interesting additions to the world lore, there.
New Novel in the Terrinoth World
The second Descent novel The Shield of Daqan has had its description released by the publisher, although it has not been announced by Aconyte yet. Sounds like its slated for early 2021.
Edited by kris40k