Chemical Reaction — Christina Thompson

FBI Agent Joe Roberts and his fiancée, Dr. Madeline Pierce, must track down a rage-producing nano-drug before it devastates the nation, in this fourth book of The Chemical Attraction Series.

Staying in Detroit with the FBI, Madeline works to develop an antidote from the confiscated journals. She clashes with the women from Joe's past. In West Michigan, Joe hunts for the bio-weapon. With a history as a player, he's worried his relationship with Madeline is at risk. Working apart, they attempt to focus on the threat.

Before Joe returns, agents are killed, Madeline is abducted, and the deadly nano-drug is put on the market. While she plays a dangerous game of deceit, Joe struggles to put his fears of losing her aside to find the weapon first. Her life, their future, and the nation's security are in jeopardy. Joe must now choose between his personal desire and his professional integrity. Can he live with the consequences?