Each year, thousands of people visit national parks across the US. And, tragically, some of them don't return. Join the guys as they interview David Paulides, the prolific author of the Missing 411 series, to learn more about his work and research into these disappearances.

They don't want you to read our book.: https://static.macmillan.com/static/fib/stuff-you-should-read/

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