How I Earned $160,000 in Passive Income from Writing Non-fiction Books

In about six years, I have sold over 40,000 books and earned over $160,000 (income) from selling non-fiction books on Amazon, all these while writing from the side.

I have a full-time job, am a father of three lovely young boys, and I don’t have time to spend 40 hours a week writing books. But in this article, I will share with you my journey.