Okay, it's been a solid month (and a few days) since my big SEPTEMBER KDP Promotion. I've got the numbers in for October, and I can compare the months previous, the month of the promo, and the month after. Let's start in July, to give us sufficient lead time. This is before any promotion: Month Books Revenue July 15 $13.43 August 74 $184.35 September 685 $1,062.59 October 17 $44.78 The KDP promotion started in early August, promoting a title with a narrower audience (political suspense vs. general suspense). Additionally, the reading season likely played a role as well, though how large is difficult to say. What can be observed is that my sales prior to the promotion and my sales subsequent to the promotion are roughly the same. The increase in revenue is due to setting the books at a higher price point ($4.99 as opposed to $2.99 or $.99. Given that the price increase came with no significant drop in sales, this means I was simply charging too little before. Good to keep in mind). The conclusion I draw from this is simple: if you want KDP to generate sufficient monthly revenue, then it'd be beneficial to promote at least one book per month, if not two books two weeks apart. With enough books to sell, it is conceivable that KDP could potentially generate a snowball effect, promoting, say, upwards of eight to ten books over a four to five month period, with two books per month (one every two weeks). If they were all in the same genre or series, this might even create a lasting impact as word-of-mouth spreads, or the sales draw the attention of the media. Of course, this means you must have eight to ten similar books to sell. What do you guys think? Are my conclusions reasonable?