(Please note: This interview originally aired back in November.) On this edition of ST, we speak by phone with Chris Guillebeau, an entrepreneur, traveler, and New York Times bestselling author. His first two books were "The Art of Non-Conformity" and "The $100 Startup" -- and today he tells us about his newest book, "The Happiness of Pursuit: Finding the Quest That Will Bring Purpose to Your Life." Within the last year or so, Guillebeau completed his personal quest to visit every country in the world before reaching the age of 35. Accomplishing that incredible goal led him to write this equally practical and inspirational book, which focuses not only on the author's own aims and ambitions but also on those of a widely diverse range of other people. Indeed, as a writer for Forbes.com has noted, Guillebeau "endeavors to bring the notion of questing closer to home by featuring a largely 'ordinary' cast of characters, and in so doing, he succeeds.... But 'The Happiness of Pursuit' isn't merely a collection of stories woven together in an attempt to titillate our daydreams. [The author] manages to wrangle the seemingly fantastical notion of questing into our everyday reality through a combination of diverse mini-narratives and practical advice on everything from how to recognize a worthy quest to how to fund one."