On Christmas Eve, I noticed something interesting on Amazon.com. Sales of "WORK HAPPY: WHAT GREAT BOSSES KNOW" had jumped up markedly. (By the way, why was an author checking Amazon on a holiday? Ask anyone who's written a book. Checking the stats becomes a hobby!) I presumed the rise in sales was simply a function of holiday shopping. But then a "Google Alert" provided another clue. (Authors also set "Google Alerts" to let them know when their books are mentioned on the web.) The alert said that KQED radio was re-playing my August interview with Michael Krasny on his "Forum" show. Now that explains a lot. Krasny is a well-respected interviewer with an almost encyclopedic knowledge of topics of all types. Our conversation, though an hour in length, seemed to fly by. And at the end of that August day, the book was in great demand on Amazon. So I know the power of his voice! That interview was replayed on Christmas Eve Day. One listener tweeted: "Heard rerun of @JillGeisler on @KQEDForum this morning... her book may be even better than the No Asshole Rule. Kept thinking 'yeah, that.' " (He was referring to a popular book by Stanford Business School professor Bob Sutton -- a high standard, indeed!) I sent the gentleman a thank you reply and he informed me he planned to use a holiday gift card to download "WORK HAPPY: WHAT GREAT BOSSES KNOW" on Christmas Day. That made my day! What is it about the interview and the book that inspires people to add it to their bookshelves and e-readers? Listen for yourself: Here's a link to the KQED Forum program on WORK HAPPY.