Amazon has this concept of author rank. According to Amazon definition it summarizes all your cross book sales and pitches you against the rest of the world. With Kindle Press-driven promotion for "Five", I had for the first time taken a systematic regular look at my own rank. Talking about modest, have a look at my ranking from the last half year. It reflects nicely my activities around the two books I published this year "Five for forever" and "Pieces of Trouble".
What do we see? February and March spikes are easy to explain. I had bought some gift copies (10 each)of my books via Createspace, that probably was the large May peak that brought me into the 100.000 for the frist time. The other earlier peaks were the typical 1-2 copies per month per book. There appears to be an interesting calculation method in place that catapults you up at a purchase but then uses some moving average to the end, which explains the right-heaviness of the distribution of each peak.
Then mid-June things became serious with Five for forever on Kindle Press and the parallel promotion on Amazon. Basically what they did is that they added my book to the various recommendation results that you typically see.
The peak was July 5th, seems there were a lot of bored people in the US Independence Day, and bought something good to read. I made it up to Author rank 27.503. This probably does not yet bring me up to ranks with Stephen King or Frederick Forsyth. But next book, next goal! Crack the four figures.
PS: Just a plug for Wattpad's "A Brilliant Plan" - the next chapters are online.