Gray Man Series

10 books in this series, ordered by part

The Gray Man by Mark Greaney

On Target by Mark Greaney

Ballistic by Mark Greaney

Dead Eye by Mark Greaney

Back Blast by Mark Greaney

Gunmetal Gray by Mark Greaney

Agent in Place by Mark Greaney

Mission Critical by Mark Greaney

Relentless by Mark Greaney

Sierra Six by Mark Greaney