The ISBN is 1 85960 511 7. The engine sections are aimed at the 4 cylinders but there is so much good information in the other sections that it is worth it for the 6 cylinder owners to have a copy of the book. If you go on Amazon.com and look up the book, you will see other sellers listed besides Amazon (which usually will take a while to source it for you). I ordered from the guy in FL and it arrived in about 5 days.