I beg to differ. Things, esp basic things for cars, don't change
too often, so relevancy is still valid.
I agree with caramon and the above contributions that some people
either does not surf the net or does not have the effort or time to
search for this kind information on the net.
With the correct pricing and marketing, it should sell well. It
should probably be something that people are willing to pay when
they visit a magazine booth or stall.
Think buy the book $9.90 save the $50 - $100 to go down to your
mechanic if you have any minor problems, worth it mah, provided no
change of parts and things like that lah.
Caramon, you have my vote too.
PS: How about a small sneak preview of your book? 
