Hi Hugh,
In that case I would suggest saving your money until you are ready to
purchase a reference book. A little more familiarity will allow you to
know what will actually need.
The simple material can be found in many online tutorials, many
of which are available on university websites.
http://www.mvps.org/dmcritchie/excel/excel.htm#tutorials
I would also recommend downloading Peter Noneley's "Function Dictionary"
http://www.rondebruin.nl/files/xlfdic01.zip it is an Excel file
and terrific coverage for beginner through expert in (high speed access
would help)
DataPig Technologies, Mike Alexander, Excel tutorials with sight and
sound (flash).
http://www.datapigtechnologies.com/ExcelMain.htm
perhaps a reference to shortcut keys
http://www.mvps.org/dmcritchie/excel/shortx2k.htm
You can learn about most worksheet functions, Conditional Formatting,
Pivot Tables, and Filters on web pages my excel.htm page can
help you find many of them.
Finally, you have invested a lot of money in Excel and
other office products, a good reference book is a small investment
compared to actual cost and to your time.