Writing (from a quick skim check) at least 16 books over a period of 6 years, and earning money from that, is not exactly what I'd call "passive income". And given the topics are mostly (all?) about niches in current technologies they also won't continue to deliver passively forever. A more appropriate title and angle might be "How I've earned $10k/book and manage to keep writing more while maintaining a day job". (W…
working in church ministry i wonder how much time the OP actually commits to work. My guess is they think they works 40 hours a week but actually doesn't.
whenever i am busy with church, family, i will put writing down. Won't ever compromise them.
And, its just a hobby i enjoy doing.