Alan Lawrie has a Bachelor of Science degree in Mechanical Engineering and a Post Graduate diploma in Astronomy and Astronautics. He is a satellite propulsion engineer and has worked in the space industry for over 28 years. During this time he has worked with space propulsion companies around the world and regularly travels to the United States where he manages the procurement of propulsion engines, tanks and valves for satellite systems. In over 70 professional visits to the US he has built up a network of propulsion contacts. He has written several space propulsion professional papers as well as a number of space related articles in the popular space press. He is a member of the British Interplanetary Society. Extensive research for this book included visits to all the key facilities in the development of the Saturn rocket including the Marshall Space Flight Center, Stennis Space Center, Michoud Assembly Facility, Kennedy Space Center, Johnson Space Center, Rocketdyne, the Saturn library at the University of Alabama at Huntsville and the Saturn records depository at the National Archives in Atlanta. Alan lives in England.