Paul McFedries, president of Logophilia Limited, is a full-time technical writer, passionate computer tinkerer, and Windows expert. He has authored 60+ computer books that have sold 3,000,000+ copies. His recent titles include Microsoft Windows 7 Unleashed, Microsoft Home Server Unleashed, Tweak It and Freak It: A Killer Guide to Making Windows Run Your Way, Formulas and Functions with Microsoft Excel 2007; and Tricks of the Microsoft Office 2007 Gurus. He is also proprietor of Word Spy (www.wordspy.com) a website that tracks new words and phrases as they enter the English language.
Bill Jelen has made more than 75 guest appearances on TechTV with Leo Laporte and was voted guest of the year on the Computer America radio show. He has produced more than 600 episodes of his daily video Learn Excel podcast. Before founding MrExcel.com in 1998, Jelen spent 12 years “in the trenches” as a financial analyst for the accounting, finance, marketing, and operations departments of a publicly held company. Since then, his company has automated Excel reports for hundreds of clients around the world. The website answers more than 30,000 questions a year—for free—for readers all over the world.