Recently out in particular has been Sounding Five, a collection of five shorts that more or less follow the same theme as Dark Angel Sounding.
Sounding Five provides five stories by habu of what possibly is the most intimate and dominating sex act one man can perform on another, one that is so intimate and extreme that it is only rarely written about. Sounding is a BDSM fetish of domination, trust, and control. One slip of the wand and a man can be ruined. Few engage in the activity, but those who do know that it can provide them with ultimate arousal and satisfaction.