Online tutorial or books for absolute beginner?

My mother just bought her first Mac yesterday; an iMac.
Although she's used PCs in the past it's mostly been for very basic
things like writing a do***ent in Word or surfing the web. She's very
confused when it comes to the Mac, and unfortunately I don't live
nearby to come and show her.

Any good books that can be suggested which explains things (the things
an everyday user needs to know -NOT the "geeky" computer type stuff)
in ordinary English (not "computer speak") and is easy to understand
and right to the point?

Also, since she's able to surf the web with her Mac, are there any
(free) online courses or tutorials she can drop by? I think she really
needs to learn the very basic things first, then move on from there to
the different applications etc.