Alan Prendergast is a crime journalist, author, and long-time columnists for Denver's Westword magazine. His new book, Gangbuster, is a fascinating look at the professional life of a Denver district attorney from a century ago, taking down huge scams and then fighting the KKK, the power of which in Denver at the time was something I didn't fully understand until reading Alan's new book. It's a fascinating and worthy read.
Gangbuster: One Man's Battle Against Crime, Corruption, and the Klan (Amazon.com)