Sam is an ordinary boy living in Dover. His grandfather was an ordinary boy too. But only if you ignore the trouble about the Second World War mine, the train, the crashed aeroplane and the long dark tunnels beneath the Western Heights with all their dangerous secrets ...The post-war remnants of Dover are brought vividly to life through the eyes of four boys as they race through shell-damaged streets, climb the towering fortifications of the Citadel and undertake a daredevil exploration of abandoned tunnels beneath the Western Heights. Jane Phillips is a retired teacher living in the Dover area. This is her second book and her first featuring her home town of Dover. Jane has taken much of the detail from real childhood memories. Nine pen and ink illustrations included, with a map of Dover's WWII fortifications. This book will appeal to young and adult readers who love a gripping nostalgic adventure.