The scarcity and high demand for truffles have led to crime in the underground truffle market, including poisoning truffle dogs, robbing truffle takes, and selling diseased truffles. "The Truffle Underground: A Tale of Mystery, Mayhem and Manipulation in the Shadowy Market of the World's Most Expensive Fungus" by Ryan Jacobs explores this shadowy market and the illegal trade of foraging for truffles in unauthorized areas.