Martello towers were built in the early part of the nineteenth century to defend the coast of England against Napoleonic invasion. Almost 200 years later forty-one of these handsome brick towers still stand along the coast of Kent, Sussex, Essex and Suffolk. The chest of their construction was comparable in relative terms to that of of today's Trident missile system. The line of towers was never tested in action, but acted as an effective deterrent against invasion. Today Martello towers are a familiar sight from Aldeburgh in Suffolk to Newhaven in Sussex, but it is generally known that similar towers were built by the Royal Engineers to defend British interests in other parts of the world. Martello towers were being built as late as the 1850s as far afield as Canada, Mauritius, Australia and the Mediterranean. This book, illustrated with numerous photographs and plans, is the first comprehensive and detailed study of the known Martello towers built by the British. Its description of their construction, use, current condition and fate will fascinate the enquiring reader, as well as being a source of interest to visitors. Many of the towers remain landmarks today, Fort Denison in Sydney Harbour being a case in point.