This is a valuable textbook for individuals interested in learning about OS/2 2.1. The book is authored by Herbert Tyson and published by Alpha Books in 1993. It contains 196 pages and is in trade paperback format. The book is written in English and weighs 8.8 Oz. The dimensions are 8.5in in length and 5.5in in width. Although the book is used, it is in excellent condition, providing a wealth of information about operating systems.