This is book 3 in the series, although there is also a Prequel - Book 0.
Dr. Lucas Forge is torn between two choices: catching the cartels with his intellect, or stopping them with a bullet. The fate of the world is at stake.

The world of the drug cartels is shifting drastically. A ruthless South American drug lord is killing off the competition with designer drugs, bullets, and shamanistic powers. He is a Brujo Negro, or black arts practitioner. His chemists are creating the ultimate addicting drug; a single dose and you are addicted forever. One man, Dr. Lucas Forge, a spec ops forensic psychologist, and his team of multi-talented spec ops forces, are the only ones who stand in his way.

If you like the Jack Reacher, Mitch Rapp, and Jack Ryan characters, sprinkled with an underlying sci-fi theme, you will enjoy this series.