Best Book of MS-DOS

MS-DOS 5 is really old OS, but this book is, no question about that, the best book I've ever read. Alan Simpson has incredible gift to present, and explain, using simple but efficient way. There are many books out there in the field of computers, networking, programing etc., and many authors are just preparing thick, heavy books with a little really usefull explanation and information. The most of them don't know how to do the transfer of the essential information and knowledge. This book can be the Bible of Teaching for them, and after that they, I believe, will stop making money by selling books per kilograms of paper. The best book of MS-DOS 5 is not the only excellent book in point of explanation, it is also very good in presenting the syntax. Print is in good organized stile, not luxury, and that is the right way to make serious and also affordable book.