9780891418696 | Presidio Pr, November 30, 2005, cover price $7.99 | About this edition: Describes how a group of American special forces soldiers known as 'tunnel rats' wages a harrowing campaign against Viet Cong guierrillas, venturing deep inside the more than two hundred miles of secret tunnel networks that existed around Saigon and engaging the enemy in hand-to-hand combat.

9780312263799 | Reprint edition (Griffin, March 1, 2001), cover price $15.95 | About this edition: An examination of the horrible reality of biological weapons looks at the use and effects of deadly agents such as bacteria, viruses, and toxins and describes how the world's governments deal with these threats.

9780312203535 | 1 edition (St Martins Pr, February 1, 2000), cover price $27.95 | About this edition: An examination of the reality of biological weapons looks at the use and effects of deadly agents such as bacteria, viruses, and toxins, describing how the world's governments deal with these threats

9780394525761 | Random House Inc, April 1, 1985, cover price $3.98 | About this edition: Explains how the North Vietnamese used underground tunnels in conjunction with other guerrilla warfare tactics against American forces and looks at the specially trained U.

9780425089514 | Reissue edition (Berkley Pub Group, March 1, 1997), cover price $7.99 | About this edition: Recounts the discovery of a network of tunnels around Saigon and the resulting underground fighting between Viet Cong guerrillas and American special forces for control of the tunnels

9780671662738 | Simon & Schuster, June 1, 1991, cover price $24.95 | About this edition: A biography of the spymaster who ran the CIA's counterintelligence operation for twenty years until his downfall

9780671778804 | Reprint edition (Touchstone Books, May 1, 1992), cover price $13.00 | About this edition: A biography of the spymaster who ran the CIA's counterintelligence operation for twenty years until his downfall

9780553343182 | Bantam Dell Pub Group, September 1, 1987, cover price $6.95 | About this edition: Describes the complex systems of tunnels the Viet Cong created in the Cu Chi area, explains how specially trained U.