Drowning a Ghost - The Chemist Series, #4

Suspended detective Cale Van Waring receives a phone call from an ex-con. The man reveals that he possesses half of a groundbreaking opioid formula that will conquer the world's pain relief market. With cartels aware of the formula, the man requests that Cale do the pick-up in his place. The courier lies dead in a midnight warehouse when Cale arrives, with his part of the formula missing. A sinister cat-and-mouse game ensues, pointing Cale toward a rural drug operation hidden amid northern Wisconsin's scenic farms and forests. Mexican cartels and deadly rural hitmen also pursue the chemical formula, understanding it is worth billions on the world market.
The major hurdle to the narcotics dealers remains the pesky Green Bay detective Cale Van Waring. A miracle saves Cale from drowning in the deep bay, deposited there by drug thugs. Continuing his pursuit, a pair of final death battles for possessing a formula transpires. During the final fray, the drug formula guaranteed to turn its possessor into the world's newest billionaire cannot be located. Reviewers say:"The well-written and fast-paced plot flowed smoothly.
I had to keep turning the pages to figure out who did what and why."  "I encountered witch doctors, voodoo, the dark web, child abduction, human trafficking, murder, illegal drugs, mystery, crime, suspense, and romance in this exciting book. Janson Mancheski did a fantastic job putting all of these different aspects in a storyline that pulled me in during the first few pages. The character development was outstanding, and I could visualize each of them.
The drawings of the formula for the new drug made the story feel more realistic."  "I couldn't put it down. Some predictability- still well done and some twists. It is rare that I gasp out loud while reading and this book got me a couple of times!"