As most of you are aware, my most recent book is now for sale on Amazon.com. For the most part, any after-publication marketing is waiting until a few other things happen first.
Quite by accident, though, I actually sold a copy. It's always interesting to see what that does to ranking. Remember that until someone actually purchases a copy, there is no ranking.
So, if you look at the data below, you will see that it only took one sale to get it to rank in the 200,000s and it is now #42 in Distance Learning books. Doesn't take much to get it to move up.
What this tells me is that there are many, many books on Amazon that never sell any copies. By comparison, the first edition of this book (which is now no longer available from the publisher) is in the 7,000,000 range.