The City of Mages is built, but it is not safe. One of the mages is murdering the others, and Resident 5613 has been assigned to find out why--and stop the murderer if they can.
B R Sanders is a white, genderqueer writer who lives and works in Denver, CO, with their family and two cats. Outside of writing, B has worked as a research psychologist, a labor organizer and a K-12 public education data specialist.
So, Sigils is quite a different story - in length, atmosphere, and general Feel - than other B.R. Sanders work readers might be familiar with. Where Ariah was epic-fantasy-length and... 'sprawling,' but in the best use of the word (sweeping?), the densely packed mage-city where every person and area is assigned a number, feels claustrophobic, which definitely seems intentional. It's a fascinating look at a unique concept, and the idea that crime would break out in such cramped quarters makes way too much sense (especially if you've ever lived in a similarly densely populated area).
The murder mystery at its core is tense and keeps you turning pages, although it's not very hard to guess who the perpetrator is - but then, I really didn't take it as a whodunit, per se, that's not where the story's point and value lies. It's more like a location character study than a straight-up mystery, something I haven't seen a lot of. Recommended if you like super interesting worldbuilding and creepily tense atmospheres.