Over 175 Amazing Techniques to Make You More Efficient in Excel, Bill Jelen spent 17 years on the road, doing 35 seminars a year to collect the awesome tips in this book. If you are already using Excel 20, 40, or 60 hours a week, the tricks in this book are for you. After many editions of milking the "=ROMAN(40) is XL which sounds like Excel" joke, this fifth edition of the book uses a blackjack theme and hopes that the vaccine will finally allow us to unmask in 2021. Zoom meetings are fine, but they aren't as interactive as a room full of people sharing their Excel experiences. Book jacket.