Air Cool VW (Beetle)
Volkswagen Official Service Manual Super Beetle, Beetle and Karmann Ghia 1970, 1971, 1972, 1973, 1974, 1975, 1976, 1977, 1978, 1979 (Volkswagen Service Manuals from Robert Bentley, Inc) by Volkswagen of America Inc.
The complete shop manual. This manual covers the front suspension of the Super Beetle which is different from all other VWs.
Chapters: Engine, Fuel System, Transmission and Rear Axle, Body and Frame, Brakes and Wheels, Front Axle, Electrical System, Strut Front Suspension, Automatic Stick Shift, Lubrication and Maintenance, Fuel Injection.
The engine, fuel, axles, brakes and transmission chapters are great. The body and frame doesn't cover the more difficult repairs like head liners. Some repairs assume that you are using all the special VW tools. Before getting this book you'll want "How to Keep Your Volkswagen Alive" which shows all the good shortcuts, and gives advice. The shop manuals assume that you are a knowledgeable mechanic, and often leave out advice based on that assumption.
My 1979 edition had color wiring diagrams, but I understand that the 1990 edition has black and white wiring diagrams. You have to figure out wire colors from the diagram because color codes are not specified.