Maim; Defeat of the Grand Sand Spirit

62,485 words. After killing Maude (in the final volume of the Pursuit trilogy) and discovering his own sadistic erotic tendencies, Maim traipses around the Western lands to become more familiar with his newly revealed and tenacious proclivity.
Maim befriends Goat, a person who spontaneously ejaculates when he hears about or imagines a person involuntarily being pained on purpose. Maim has stories for him, including about Maude, who Goat had worked with. Goat is the telegraph operator who is key to the anonymous assassin business Maude had established, an assassin whoes contact name is M.Sharp.
(Note: This book contains many incidents of immobilizing someone and intentionally paining them for the torturer's high erotic sensations, generally but not always a slow torture to death.)
A rancher wants to hire M.Sharp to rid him of a pesky person or people who are shooting ten cows of his every day.
The Grand Sand Spirit group is doing the cow shooting. It is a group of nutty religious nutcases who, it turns out, are being sponsored by the very rancher who hired M.Sharp.
Maim had some experience with theater and now uses his Rita persona to represent M.Sharp during the hiring process. When hired, Maim uses his Frank persona to infiltrate the Grand Sand Spirit group. And during that process, Sadi finds him.
Sadi is as sadistic as Maim is. As Sadi suggested, they are Maim the Maimer and Sadi the Sadist. (During the last half of the book, Sadi reveals a pleasant but unexpected surprise for Maim.)
The harsh torture to death of the last adherent of the Grand Sand Spirit belief is an erotic activity enjoyed by both Maim and Sadi.
This book is intended to begin a series. This book suggests things that are complete in themselves but also could be incorporated in later stories.