The Ways Of Killing Men
Richard Camellion ((supposedly))
"... the Death Merchant is seething that the CIA has forced him back into their service! He'll save their bacon one more time - before he serves them breakfast in Hell! The Ways of Killing Men."
This is an interesting book. After 6 years of being promised or rumored, it was finally released in 2018. It talked about the Death Merchant being forced back into action and indicated he would be putting together a 'killer' team.
The prologue is the first half of the book. Then the main character shows up. By then, the two main characters from the original author's other series are no longer with us. Like I said, interesting.