$56 dollars today. The book is on an educational robot.
About $3-4 a year. Usually around this time of year when people are buying gag books. The first slew of sales actually came from amazon book reselling bots buying it. Guess they never figured out that it was print on demand.
See The Most Action Trailer :- https://www.youtube.com/watch?v=J8z7Hx_y5uI It is an Invitation Not Spam
~$5k/mo.
I aim for quantity over quality. I pay to have books ghostwritten for a particular market/niche. I also acquire rights to other self published books and re-release them. Self publishing is all about the marketing.