This is the first really comprehensive book on the subject of sails, amply and exhaustively analysed. Starting with the history of sails and the theory of sailing, the author passes to the questions of materials, the making and finishing of sails, rigging and tuning. Sails for working conditions, for light and heavy weather, and for reaching and running are examined in detail. Spinnakers have their own special section. There is advice on care and maintenance and expert information on how to alter sails in a considerable number of ways.