You want to buy this ebook if you’ve already read the other books If you haven’t read the others books, start with The Rookie.
The Rookie (book 1):
https://smile.amazon.com/gp/product/B004EHZUNW?notRedirectToSDP=1

The Gangster (book 6): https://smile.amazon.com/gp/product/B08W1YSLR2?notRedirectToSDP=1

Scott Sigler: https://scottsigler.com/