The Tracker — J.R. Roberts

The Gunsmith hasn't seen Abel Tracker in years. The two were once good friends, but a falling out put distance between them in more ways than one. Now Tracker needs help, and he knows the only man who can supply it is Clint Adams. Tracker arranges a meeting, where the two men can not recall what the falling out was about, so he recruits Clint to help him track down ten killers.