Books?

[ANDREW_ATWELL@HP-PaloAlto-om20.om.hp.com]

     Can anyone reccomend some books for the non-technically skilled on 
     auto repair, how things work etc. so one might be a little more savy 
     or at least not have a dumb look on the face when the mechanic is 
     talking to (trying to rip-off) you? 
        At my job I am the car guy that ends up answering all questions and 
     it is getting tiring I would rather have a book to reference them too. 
       I have heard of "Auto repair for Dummies"  But it is out of print.
     
     Thanks, please reply privately.
     
     Andy