Kent's military heritage is well known because of popular tourist attractions such as Dover Castle or Chatham Dockyard, but there are also many lesser-known sites dotted around the county, each with their own story to tell. Most of the sites included here date from the Second World War but there are also many military installations from other eras, from the eerie remains of the towers in the Thames Estuary to the magnificence of Fort Burgoyne.

Kent: Britain's Frontline County examines the fascinating ways in which Kent has protected and defended Britain over the centuries. Local author and historian Clive Holden has carefully documented each of these secret gems and photographed them in full colour, giving the reader a wonderful insight into a lesser-known aspect of Kent's proud heritage.