The Hard Line: A Gray Man Novel

by Mark Greaney

1 pages, Audio CD

Published February 17, 2026

About the author

Mark Greaney has a degree in International Relations and Political Science. In researching The Gray Man series he traveled to ten countries and trained extensively in the use of firearms, battlefield medicine, and close range combative tactics.

Learn more at MARKGREANEYBOOKS.COM

Email Mark at MarkGreaneyBooks@gmail.com