Unthinkable

Brady Johnson was looking forward to a peaceful retirement on a Northern Minnesota lake and in his St. Petersburg, Florida condo after decades of fighting Mexican drug cartels. He tried to forget the past, but the many bitter enemies he made in his years with the U.S. Drug Enforcement Agency in San Antonio Texas, did not retire, did not forget, and did not give up their burning thirst for revenge. They caught up to Brady in Florida.
Years earlier his wife's rape and death at the hands of a cartel triggered a murderous rampage against all drug dealers, and when the same cartel murders a new-found love interest in Tampa Bay, it ignites the same rage that drove him over the edge the first time.
He finds himself teamed up with two women - a Mexican National former DEA agent, and a Native Canadian, both of whom had survived cartel assassination attempts - and when they venture into Mexico after the traffickers, they uncover a joint cartel/Muslim terrorist plot to inflict a series of horrific attacks on the United States, Canada, and Mexico. Attacks that would effectively destroy all three countries.
When the cartels realize that they, too will be destroyed by the Jihadist offensive, they renege on the partnership they had forged with the Muslims and eventually join forces with Brady's small group. But, in trying to prevent the terrorist attacks, the trio uncover another, more sinister plot against the United States unfolding in Northern New York and Ontario. Their quest comes to a shocking conclusion in the Thousand Islands region of the St. Lawrence River.