Bob Umlas is the longest running Microsoft Excel MVP. He has been using Excel since version 0.99 (on the Macintosh)! He was voted an “MVP” (Most Valuable Professional) by Microsoft each year from 1993-2018. Bob is the author of “This isn’t Excel, it’s Magic!” which is available from Amazon.com. Other books, “Excel Outside the Box” and “More Excel Outside the Box” are available from http://www.mrexcel.com and are for the very advanced Excel user. Also, there’s a kindle book, “Excel Preschool: Finally Understanding what Excel is all About” – a book for the very beginner!