Imbalance - a mystery-thriller by E.W. Johnson M.D. - book promotion sites

This book is on sale on Amazon for $0.99 (regularly $2.99) 7/27/2021 – 8/17/2021!
Dr. Sean Nolan has earned a reputation as a relentless detective. When contacted by a young reporter investigating a designer drug with connections to a large pharmaceutical company, the request for help is declined when federal authorities block the inquiry. Days later, when the reporter vanishes without a trace, everything changes. The guilt at not offering assistance becomes an unbearable burden.
Now all Dr. Nolan needs to do is track down the reclusive billionaire owner of Geneteer Pharmaceutical somewhere in Africa. What could possibly go wrong?