Several years ago I somehow stumbled across a site hosting an unpublished book by Georgann Cross. The book is titled Sexual Power for Women: A Real-World Guide to Sexually Enslaving Your Man.
I downloaded the book in PDF form that night and ended up... reading the entire thing straight through (which took several hours and I was up until the wee hours of the morning.
It is a very well-written book instructing techniques from a woman's point of view on how to take control in a relationship or marriage. There include several real-life stories that give examples of a woman taking control yielding great benefits for a relationship.
The site can be found here: Sexual Power for Women
If you are a woman just discovering this lifestyle or if you are a sub male trying to introduce his partner in a non-threatening manner, I would definitely recommend giving it a read.