An Amazon Countdown Deal on Tendrils of Life (that has just ended) yielded a good result. The following screen shot was taken in the early morning of February 13, 2014.
It didn't get within the Top 100 Paid in Kindle Store, but #122 was not bad. It surprised me that it became #11 in Nonfiction category. (Though it has some nonfictional elements, Tendrils of Life is a work of fiction.) Perhaps people had flocked to romance novels because of Valentine's Day (probably it didn't help me), leaving nonfiction books in the dust.
It will not last long. Already it has slipped to #4,983 (from #122). It will go down considerably more before the next promo.
Though it was temporary, the following author rank was not too bad with just one book.
And the #1 Best Seller sticker Amazon places was pleasing to see.