Kassie

Try Chip Pearson's site, but if you have a need for a book try any of the
Excel Formula series by John Walkenbach.

Posting specifics in here will normally get an answer too

Hi Kassie!

You could look at:

Peter Noneley
http://homepage.ntlworld.com/noneley/

Also if you apply direct to me you can have my Functions List file
that covers, Source, Classification, Description, Syntax and details
of the arguments required.

And for a text covering Excel Formulas use John Walkenbach's Excel
2003 Formulas.

But perhaps the best additional resource would be to do a Google
search on particular functions or problems using Ron de Bruin's Google
Search tool that you can operate from within Excel.

Ron de Bruin:
http://www.rondebruin.nl/Google.htm

In addition to Norman's and Nick's suggestions, You will
almost always find help in these newsgroups. If the
problem has a solution, someone here will have the answer.

These groups are probably the best Excel resource on the
net. Just ask Steved :)

WB

Just post your thoughts with whatever detail you have and let us see what we can
do to help out  :-)  The more lucid the question though, the easier it is to
answer

An additional source is Excel's help feature