Haynes says this book is a documented total rebuild of one of these cars, specifically, a 1988 Buick SkyHawk Custom equipped with the Chevy 2.0L engine. If you're looking for information and directions on rebuilding one of these cars, don't look at this book.
The coverage of 'special' things is limited or nil, especially the Chevrolet 2.0L 4Cyl turbocharged engine that was installed in the SkyHawk Sports. They briefly cover only the fuel rails, and don't even mention the turbocharger itself. But if you need a crash course in repairing the 2.0L 4Cyl, or working on the rest of the car, you won't find an easier to use book. :)