Bill Jelen is the host of MrExcel.com. Author of 60 books about Microsoft Excel, Power Pivot and Power View. Publisher of books about Microsoft Office. You will find him on the road doing live Power Excel seminars for 35 events a year. He has over 2000 Excel videos on YouTube. Microsoft Certified Trainer. Specialties: Microsoft Excel, Power Query, Power Pivot and VBA code for Microsoft Excel.