$16,228 earned, 1014 copies sold: Lessons from a year as a self-published author (joshuaearl.com)

It's actually quite surprising to see how steady the income was, as opposed to a sudden 'boom' then a steady whimper. The great part is once you have that initial audience, it's even easier to generate larger revenue on your next title.

Thanks for sharing! Do you mind if I ask: how much time did you put into writing the book, and how much time did you spend on promotion?

And I did think this statement was not quite realistic ;) "The book’s audience is software developers, a group of professionals who might earn $100, $150 or even $250 an hour."

Other than that, I'm looking forward to reading your book!