"The Tunnels of Cu Chi: An Untold Story of Vietnam" by Tom Mangold and John Penycate is a vintage nonfiction book published by Random House in 1985. This hardcover book, with a dust jacket, explores the hidden tunnels of Cu Chi in Vietnam during the war. Illustrated by the authors, this 304-page book delves into the technology and engineering of the tunnel system, providing a unique perspective on the military aspects of the Vietnam War. The book offers a detailed account of the tunnels' construction and significance, making it a valuable addition to any history or military genre collection."