Extreme Faction by Trevor Scott, (Jake Adams Series, Book 2) from Books in Motion.com

Former CIA Officer Jake Adams was hired to guard two Oregon agribusiness honchos during a conference in Odessa, Ukraine. He had no idea it would bring him back into duty with the Agency. Jake is given orders to find the killer of a former Soviet biochemist. When terrorists begin striking around the globe using deadly nerve agents and biological weapons, Jake knows the attacks are related, and that the weapons were developed from the biochemist's research. Haunted by visions from his past as an observer in Iraq, Jake must confront his demons and continue his pursuit of the murderer. The investigation takes him deep into the Kurdistan mountains to battle an extreme faction of holy warriors bent on terror. Only one man can stop their deadly plans...Jake Adams!