Holy Macro! Books has been providing top-quality books on Excel, Power Query, and Power BI since 2002. They have published over 100 titles by 30 authors, including numerous Microsoft MVPs.
Bob Umlas is a Microsoft Excel MVP and the author of Excel Outside the Box and This Isn't Excel, It's Magic. He is a contributing editor to Inside Microsoft Excel who has written more than 300 articles on all aspects of the program. He was a coleader of New York City's PC Excel Special Interest Group for more than a decade. He lives in Palisades, New York.