The Tunnels of Cu Chi: A Harrowing Account of America's Tunnel Rats in the Underground Battlefields of Vietnam
by Tom Mangold, John Penycate,

DESCRIPTION:

At the height of the Vietnam conflict, a complex system of secret underground tunnels sprawled from Cu Chi Province to the edge of Saigon. In these burrows, the Viet Cong cached their weapons, tended their wounded, and prepared to strike. They had only one enemy: U.S. soldiers small and wiry enough to maneuver through the guerrillas' narrow domain. 

The brave souls who descended into these hellholes were known as "tunnel rats." Armed with only pistols and K-bar knives, these men inched their way through the steamy darkness where any number of horrors could be awaiting them--bullets, booby traps, a tossed grenade. Using firsthand accounts from men and women on both sides who fought and killed in these underground battles, authors Tom Mangold and John Penycate provide a gripping inside look at this fearsome combat. The Tunnels of Cu Chi is a war classic of unbearable tension and unforgettable heroes.

Amazon.com title link: 
http://www.amazon.com/The-Tunnels-Chi-Underground-Battlefields/dp/0891418695