The Art of Fermentation: An In-Depth Exploration of Essential Concepts and Processes from Around the World by Sandor Ellix Katz (with a foreword from Michael Pollan) made the leap to #34 from #481, as of the morning of June 14. The book, published by Chelsea Green, was on NPR's Fresh Air on June 13 as part of the story "Fermentation: When Food Goes Bad But Stays Good."