One advantage to advertising a book, even a free one, is if you sell or give away enough copies it gets into Amazon's ranked groups (100 top free science fiction, e.g,), and folks who didn't get the email promotion notice it. Turnabout did okay, It made it to:
- #199 in Kindle Store > Kindle eBooks > Teen & Young Adult > Science Fiction & Fantasy > Science Fiction > Dystopian
But The Sixth Discipline jumped up to:
The screen shot below was created in Firefox, as I discovered the Chrome browser didn't let me select a one-day future date, but the Firefox version did. I highlighted the date range so you can see it's for those two days. I couldn't include Thursday because it had over 1,000 downloads and that would make tomorrow's 23 too small to show as more than a tiny blue line.
The really odd thing is, I was using Chrome for Android on my phone when I noticed this!
Also note, these numbers are for Amazon only. iBooks and B&N take a little longer to report "sales figures" because I get them via Smashwords.