Quitting Time — Robert J. Conley

For many years Oliver Colfax worked as a hired killer. But after he developed a friendship with one of his targets, Colfax lost heart in that line of work and quit. A few odd jobs keep body and soul together, but until Colfax decides what to do with the rest of his life, he's content sitting in his St. Louis hotel room and drinking fine whiskey.

When a rancher from Colorado asks him to deal with some cattle rustlers, Colfax declines, thinking it is just one more case of a big landowner wanting it all. But when Colfax learns that a production of Titus Andronicus is playing in nearby Pullman, Colorado, he has a change of heart. He has always longed to see someone play Titus.

Dealing with the cattle rustlers proves to be a routine job, but investigating the tragedy that hits the touring Shakespearean drama troupe turns out to be a tough assignment. It may be the hardest case he's ever taken on, one that is certain to change his life forever.