Sigma Technical Press, Wilmslow, Cheshire; 1983, first edition; 155 x 210mm; pp xii, 332; thin art boards titled orange and black; slight rubbing or light bumping of the cover but otherwise in good to very good condition.

As the title suggests, the book is a comprehensive account of the popular operating system produced by Digital Research, written by three consultants with special interests and experience in the topic.