Reviews say it's the best of O'Reilly's "Killing..." series. I'm into the frontier and old west stuff. I alternate between the fiction and nonfiction. Just finished "Where There's Fire, There's Smoke" by William Johnstone. Part of his Mountain Man series about Smoke Jensen.
The third of an historical fiction trilogy about Deputy U. S. Marshall Bass Reeves. https://www.legendsofamerica.com/we-bassreeves/
Three at a time, Chris? I'm not a fast reader and may only get a chance to read leisurely once or twice a week. If I had three going, I'd get plots so mixed up I wouldn't know which book I was reading even if I looked at the title@
I find I have to mix the "heavy" stuff with some lighthearted reading, especially towards bed-time! Lister's book are out of print of course, I get them from on line resellers, I will hold on to these forever and re-read them every couple of years. Good thing about ageing: you kind of get to rediscover the books you thought you had once read before