Our guest on ST Medical Monday is Benjamin Lorr, a writer based in New York City. He tells us about his interesting new book, "The Secret Life of Groceries: The Dark Miracle of the American Supermarket." As Lorr writes in the Introduction for this work: "This book is about the grocery store. About the people who work there and the routes of supply that define it. It is the product of five years of research, hundreds of interviews, and thousands of hours tracking down and working alongside the buyers, brokers, marketers, and managers whose lives and choices define our diet. The five years were a time of dramatic upheaval. Walmart seized organics. Amazon seized Whole Foods. The promise of automation loomed over trucking. Minimum wage laws shifted, giving employees the promise of a new salary floor. Yet, what I found, whether talking to Whole Foods executives about the Amazon deal or to new Amazon employees as they stocked shelves, was that during this upheaval the most primal drives in the industry weren't so much disrupted as elevated and laid bare. What emerged is a fascinating and largely hidden world."