mark greaney

Author Mark Greaney Talks New Jack Ryan Book, 'Commander In Chief'
Author Tom Clancy passed away a few years ago, but Jack Ryan fans don't have to worry. The character lives on. The newest installment in the immensely popular Jack Ryan series, Commander In Chief, by Mark Greaney is described a "taut, action-packed, spellbinding tale of international intrigue and suspense...