Not bad considering my first book was published less than 4 1/2 years ago.
However, my most popular book each quarter still remains Submissive Training - not sure if people buy this thinking they are getting a manual! However, I am very pleased to get the royalties for it.
Other popular books are The Submission Challenge which was first in the Doms & Acquaintances series of which Submissive Training was the second in that series.
Another one is Wife for Three - possibly because it is clearly going to be a menage story (my first sci-fi).
Retraining the Sub, Collared by Wolves, Alien Manhunt and Men for Hire are also popular titles.