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| John Walkenbach is one of the country's leading authorities on spreadsheet software. He's principal of Jwalk and Associates Inc., a Southern California-based consulting firm that specializes in spreadsheet application development. John is also a shareware developer, and his most popular product is the Power Utility Pak add-in for Excel. John has written more than 250 articles and reviews for publications such as PC World, InfoWorld, Windows, and PC/Computing. In addition, he's authored more than 20 other spreadsheet books, including Excel 97 Bible, Excel 97 For Windows For Dummies Quick Reference, and Excel 97 Programming For Windows For Dummies. jwalk.com). When he's not banging away on his computer keyboard, he's probably banging away on one of his guitars, trying to cop a few blues licks from Freddie King.
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