Anyone who has visited The Stirling Society's stand at an exhibition will almost certainly have seen the indefatigable figure of Roy Darlington demonstrating his models and generally spreading the Gospel according to the Reverend Stirling, as he puts it. Here, helped by the CAD skills of Keith Strong, Roy describes how to design, build and optimise Stirling engines, and a broad selection of his engines is also described. Plus there is a considerable amount of information on the manufacturing and machining techniques Roy has used during many years of designing, developing and building hot air engines. A major addition to books on the subject of hot air engines and superbly produced. 240 pages. 400 colour photographs. Hardbound. The Crowood Press.