This is a novella from the Ustari Cycle. The story is of Lem and Mags. Magic is produced by gas which is created by blood letting. Most magic users bleed others to get the gas they need to make magic. Lem and Mags do not believe in using the blood of others. Lem is highly principled and Mags is not functioning at full throttle. The previous words are taken verbatim from my review of the novella Last Best Day by the same author.
A elderly mage decides that technology and modernization has robbed her of her rightful place in the sun decides to rid the world of civilization by fermenting chaos. Lem becomes a victim and then a hero. The concept of magic being fueled by blood is the root of the two stories I have read. Lem and Mags are handicapped because of their refusal to inflict pain and destruction on others to magnify their own abilities.
Somers has provided Lem with a conscience and periodically has him express the fact that blood mages are pretty despicable. The most powerful in their world are the most despicable.
It was a good story.
I enjoyed it.
This book may have been received free of charge from a publisher or a publicist. That will NEVER have a bearing on my recommendations.