John Christopher has written and edited a number of books on Engineering, Military History and Railway and Road Transport, specializing in the life and works of Isambard Kingdom Brunel and being the series editor for Amberley’s Bradshaw’s Guides series. He has also appeared in Michael Portillo's Great British Railway Journeys television series. In between writing books, he is a balloon pilot and Land Rover fan. He lives in Gloucestershire. Campbell McCutcheon has had a life-long interest in the Olympic-class vessels and naval shipping. He has written extensively on the subject along with some Military History and Bradshaw’s Railway titles for Amberley. He lives in Gloucestershire, but he was born within sight and sound of the water and has been interested in ships from a young age.