Tony Hsieh's Delivering Happiness debuted at no. 1 on the New York Times bestseller list and stayed on the list for 27 weeks. Jenn Lim was a key to that success, leading the launch of he book and then becoming CEO of the company that grew from it. She is now out with the follow-up Beyond Happiness. She talks with Tristan about how she arrived at that title, what she has learned about the keys to fulfillment and how the book and her life were affected by Hsieh's death last year.