Close observers of Maryland geography will immediately recognize that the author has allowed himself to manipulate the landforms of the stale to suit his dramatic purposes. To note two such obvious alterations in reality, South Mountain, though it exists exactly where I have placed it, is not nearly so high and formidable a peak as I have pretended. And the relationship of Burkittsville to South Mountain has likewise been adjusted a few miles to fit the story together more conveniently.I’ve allowed myself a similar latitude in depicting the performance of certain military units. Though in fact the Army’s Special Operation Group/Delta, the Rangers, and the 1st Battalion (Reinf), Third Infantry, as well as light infantry and tactical air support units of the Maryland National Guard and the Maryland Air Guard do exist, the author hopes that readers understand this is a work of fiction, and although it aspires to accuracy in its portrayal of procedure, its depiction of the performance of these units during a national security crisis is wholly a fabrication.Finally, the author would like to thank all who gave so generously of time and energy in his researches. These include colleagues Michael Hill, Randi Henderson, Matt Seiden, Pat McGuire, Weyman Swagger, and Fred Rasmussen; friends Lenne P. Miller, Jr.; Joe Fanzone, Jr.; Gerard F. “Buzz” Busnuk; T. Craig Taylor, Jr.; David Petal; Ernest Volkman; my father-in-law, Richard C. Hageman; my brother-in-law and medical adviser, John D. Bullock, M.D.; my brother, Tim Hunter; and my two children, Jake and Amy, who cooperated (more or less) on a long Sunday drive out to South Mountain. And lastly let me issue special thanks to four believers without whose support I could not have endured: my indefatigable agent, Victoria Gould Pryor; my editors, Peter Guzzardi and Ann Harris of Bantam Books; and most especially, my hardworking, ever cheerful, and forgiving wife, Lucy Hageman Hunter.