May I suggest that you have a look at a free eBook, Unbuntu Pocket Guide and
Reference, obtainable from http://ubuntupocketguide.com/index_main.html

I actually bought the paper version of the book because I find that it is
easier to use a reference book if I can turn the pages ...

But have a look - it is very good.

There are other Ubuntu books including eBooks available too. I suspect that
Mark Shuttleworth has started a whole cottage industry there. Try Google.