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Johann Hari is a journalist with an interesting past who has now written four very popular books on scientific topics (addiction, depression, attention, and obesity). Are those books any good?

In this paid-subscriber-only episode of The Studies Show, Tom and Stuart—who have both written reviews of Hari’s books—discuss Hari’s career, his sudden emergence as a science writer, and exactly how many miles you need to travel around the world to ensure your book becomes a New York Times bestseller.