Any Car Repair "Dummy" books to recommend

A friend wants to start doing more work on her car -- a Mustang.

She changes the oil, but that is it. She seems to think that since I change filters, rotate tires and attempt various other tasks with varying success that I should know a good "starter" book for car repair.

I mentioned Chilton's and Hayes, but those books in my experience seems to assume some knowledge of some sort.

Any other books any of you know about? I know there are online sites, and those might be helpful, also, but in my experience, being able to actually tote a bound book outside to the car is unbeatable.