This is the first book published in Gladstone's Crafts Series. I found the world he created fascinating for his use of metaphors for the operation of institutions that exist in our world: gods kept alive by fealty from their worshippers, craft representing science in many ways through which man does things for himself without relying on gods, and the economic relationships involved described as trading of soulstuff.
The story is good too but suffers from weak integration of story and theme. The result is a lot of exposition in the last third of the book instead of outcomes told through changes in plot and relationships.
Nevertheless, it's a fascinating world and an exciting mystery, with several very cool characters.