A new insight, in unique Haynes Manual style, into the remarkable story of how clever, improvised engineering, remarkable teamwork and the sheer will to succeed averted a major catastrophe. How the crew - Jim Lovell, Jack Swigert and Fred Haise - were able to work with Mission Control to transform the Lunar Module into a 'lifeboat'. The Apollo spacecraft and the Lunar Module - how they worked and a summary of the equipment and the technology behind them. The mission - a detailed narrative of how the flight was planned, what was expected, the aims of the mission, and what happened hour-by-hour. The analysis - what the post-flight investigation uncovered, and the technical design problems with the spacecraft. The legacy - the redesign of sections of the Apollo spacecraft, and the changes to the organisation of subsequent missions, beginning with Apollo 14. Extensively illustrated throughout, using material from the NASA archives, including Apollo 13 mission manuals and previously unpublished imagery.