Despite the combination of business and open source being more than actual due to the log4j hack, the interest in my book offering some answers on how to save open source from such disasters is getting below zero.
I sold 22 copies in November, which is 6 more than the month before, but with December half gone, I only sold 5 copies this month.
The hardcover is losing terrain. No one ordered the hardcover version in October or November. The percentage of books sold through Amazon is increasing.
As explained before: Amazon sales aren't the most lucrative sales:
The monthly revenue is dropping rapidly:
For the sake of completeness, I also add the most recent chart showing the evolution of the average royalty I receive per book for each channel.