The bestselling author has published 28 books -- military thrillers with political intrigue and high-tech tactics -- including a new novel yet to be released.
Perhaps best known for his novel "The Hunt For Red October," which inspired the movie of the same name, Calncy's writings also inspired the "Rainbow Six," "Ghost Recon" and "Splinter Cell," video game series.
No cause for the author's death has yet been released.
Interpol investigating stolen passports on missing flight
Scarlett Johansson steps out with fiance after pregnancy reveal