Peter Norton’s MS-DOS
This book was very helpful to me during my halcyon days of working with MS-SOS 6.22 and Windows 3.1 and 3.11. This was the operating system and I must say that if you knew how to use it, it could be very stable and just do the work, with no questions asked. This book is still in my possession and I cannot bear to chuck it out. I suppose that it will come in handy one day if everyone in the world gets fed-up of Windows 10 and decides to migrate back to DOS! LOL!