My eBook, Next History, came out in 2014 on Amazon, and recently I've expanded to include Kobo, Apple, B&N, plus various other publishers. It sold fairly well in the beginning, but faded. Now I'm working on a re-launch and part of that effort is a new cover.
You can read about the book (and see the most recent cover) here -- www.amazon.com/dp/B00BLT0AZO
Whales figure prominently in the plot, as does the occult pentagram. I felt that your Midnight Whales image would fit nicely into the bottom portion of the design; it would place the young woman looking toward the pentagram, which is the problem she's faced with in the book.
On the Amazon page there's a description that teases what the book's about, and some reviews.
Before you go to the work of contacting all your stock sources, I'd like some idea of your price to use the image.
Thank you very much, and once again big kudos on your artworks!