Bill Jelen is the host of MrExcel.com and the author of 60 books about Microsoft Excel including Excel Gurus Gone Wild, Pivot Table Data Crunching, and Excel 2019 Inside Out. He has made over 80 guest appearances on TV’s Call for Help with Leo Laporte and was voted guest of the year on the Computer America radio show. He writes the Excel column for Strategic Finance magazine. He has produced over 2200 episodes of his daily video podcast Learn Excel from MrExcel. Before founding MrExcel.com in 1998, Jelen spent twelve 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 automates Excel reports for hundreds of clients around the world. The website answers over 30,000 questions a year – for free – for readers all over the world. In his free time, Jelen is a rocket launch photographer for We Report Space.