John McEvoy wrote what has to be the first English-language book for mezcal geeks: Holy Smoke! It’s Mezcal came out in 2014. So when John sent us an email complaining that we “left out the most important part” in our “Tequila vs Mezcal” episode … well, we invited him on to try to convince him that he’s wrong. Will it work? Can we change the mind of the man who goes by Mezcal PhD? Find out in this episode of Agave Road Trip!