Here is a list of books on Excel.
http://www.contextures.com/xlbooks.html

John Walkenbach has written a bunch of books. I'd frequent a bookstore
and/or library before I made a decision.

HTH
Paul
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Be advised to back up your WorkBook before attempting to make changes.
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I should get a book on writing VBA scripts for Excel rather than rely
on the help pages. Any recommendations?