Anyone who thinks they'll be able to completely rebuild a Porsche 911 using this book (as the cover claims) is living in a world of make-believe. As the other reviewers have pointed out, the book glosses over any 911 made after 1977, and doesn't give any instruction on activities that the home mechanic might want to do, such as removing the airbox or changing the sparkplugs or filters. If you're serious about working on your 911, pony up the cash and buy the factory manuals. They're expensive, but worth the price you pay for them, especially if you factor in the money you're saving on labor costs. The Haynes manual is seriously out-of-date and useful only as an occasional reference.