Transformation (The Eternal Dungeon, Volume 2) - Turn-of-the-Century Toughs, #2

"Every psychologist of our day knows the origin of transformation therapy, though many prefer not to speak of it. It is considered embarrassing to be forced to admit that your primary tool for curing patients was developed by a group of torturers."The Eternal Dungeon, a royal prison where criminals are transformed, has lost its leadership. The duty of returning the dungeon to normal falls on two Seekers (torturers) who are already burdened with their own problems.
One Seeker is struggling to understand why an old love affair continues to gnaw at him. The other Seeker is faced with his greatest challenge: whether to risk the man who is most precious to him in order to save his own abuser. A winner of the 2011 Rainbow Awards (within the "Eternal Dungeon" omnibus), this tale of love and adventure can be read on its own or as the second volume in The Eternal Dungeon, a speculative fiction series set in a nineteenth-century prison where the psychologists wield whips.
The Eternal Dungeon series is part of Turn-of-the-Century Toughs, a cycle of alternate history series (Young Toughs, Waterman, Life Prison, Commando, Michael's House, The Eternal Dungeon, and Dark Light) about adults and youths on the margins of society, and the people who love them. Set in the nineteenth and twentieth centuries, the novels and stories take place in an alternative version of America that was settled by inhabitants of the Old World in ancient times.
As a result, the New World retains certain classical and medieval customs.