Underground the way to the future was the motto of the World Tunnel Congress 2013 in Geneva, Switzerland. The use of underground space has gained importance dur

Underground Spaces Unveiled is a broad overview of the concept of underground space development investigating the issues that are associated with the sustainabl

NEW YORK TIMES and WALL STREET JOURNAL BESTSELLER ONE OF THE WASHINGTON POST'S 10 BEST BOOKS OF 2015 One of the world’s leading authorities on global security

"With a new foreword by Frederick L. Kirschenmann..."

Introduction -- Tunnels in conflict : from ancient uses to contemporary threats -- Underground warfare : from a tool of war to a global security threat -- Sover