Martin Bowman seems to write day and night.
On this site there are 188 titles by him (have not checked them to see if any doubles) and it looks like he can write about everything.
https://www.goodreads.com/author/lis...artin_W_Bowman
I would say a book needs at least one year including research to be of any use for others. There are those on this site, I know, who never would do anything after just a single year having spent perhaps their entire life doing research.
If we assume Bowman has been writing for 50 years it means he gets a new title published every three to four months a year.
I have a few titles but must admit I find them wanting. So basically no more books by Bowman for me....
Theo, my symphathies to both you and your hard work. I think most of us here eagerly awaits your new NJ volumes!! I know I do!
Cheers
Stig
Stig