I started writing a popular history book a few years ago and found it really tough once I actually dug into it! Kudos on publishing so many and with such good reviews. Can I ask if you have an academic background in history?
I do not. It is just my passion since I learnt to read.
Around the age of 35 I realized that there was a lot of interesting and weird stories to share with others and I started narrating them in an online magazine published by my friend. For example, life and death of Hernando de Soto, the unsuccessful conquistador. (https://en.wikipedia.org/wiki/Hernando_de_Soto).
People liked the format and actually started to send micropayments. It still took several years before I actually tried to put together a book. I started a crowd-sourcing attempt which, to my (pleasant) surprise gathered over 300 per cent of the target sum.