Not the Same As Hayes Manual, Adds to the Library,
This book is bigger, heavier, more white space, larger print, better diagrams and illustrations, and for all those reasons, it adds to the library.
The “Driver's Handbook” is 22 pages of really basic stuff, while the special tuning manual appears to be more or less a restatement of the calibration data for the car.
If I could only afford to buy one book, I would not buy this, and would go instead with the Haynes Manual. If money is not an issue, I would buy this book fourth in line, after Haynes, “The MGB Restoration Manual” by Porter which dramatically enhances Haynes on points of restoration, and “Original MGB C-V8 Compl: The Complete Guide to All Roadster and GT Models (Original Series)” by Anders Ditlev Clausager which is a dramatic color photo compilation of what perfect looks like.