Murphy's Laws of DOS/Through Version 6.2 (The Murphy's Laws Computer Book). Charlie Russel, 1993.
 
If you're tired of long, boring, and unfriendly books about DOS, here's relief. This plain-English, problem-solving book will tell you everything you need to know about DOS and entertain you in the bargain. Filled with step-by-step instructions and stress-reducing advice, this book will be the best purchase you ever made.

Just mild cover wear.