UNKNOWN THREAT - Robin Lyons

Meet Mac MacKenna, ex-air force special operations.

Mac’s retired life is pretty boring after 20 years in the U.S. Air Force, mostly in special operations. He’s intrigued by the police chief’s undercover proposal and accepts the mission. His assignment…root out the criminal activity at the high school before children die.

Soon enough, his former life of loaded weapons and death-defying rescues has been replaced by arrogant parents, self-serving politicians, and questionable employees.

Unfortunately for Mac, meddling with the rich can have deadly consequences.