What to read after Deadly Additive?

To soldier-of-fortune Jeb Sledge, the assignment seemed simple: Rescue an heiress and her journalist friend from Colombian guerrillas and collect a sizable paycheck for his troubles. But things rarely go as planned.After stumbling upon a mass of dead bodies, Kristin Halvorsen isn't about to leave Colombia without the proof she needs for the story of a lifetime, and Sledge soon finds himself ensnared in a chemical weapons conspiracy that involves civilians, guerillas and high-ranking government officials.But neutralizing the factory isn't enough. Where are the weapons that have already been fabricated? Who are the intended targets? How potent and far-reaching are the effects?A pursuit through South America, the U.S. and the Caribbean embroils Sledge and Kristin in a mission to prevent a catastrophic attack'and leaves Sledge fighting to save both their lives.