Dr. K Mandrake is one of the authors of the best-selling The Psilocybin Mushroom Bible: The Definitive Guide to Growing and Using Magic Mushrooms. He earned his doctorate in mycology in 2014 and he writes about mushroom botany for publications the world over and consults internationally on psilocybin production for therapeutic use. Virginia Haze is one of the authors of the best-selling The Psilocybin Mushroom Bible: The Definitive Guide to Growing and Using Magic Mushrooms. She's a regular contributor to publications that focus on recreational drugs and her photography has appeared in many books, including The Cannabis Grow Bible and the series Cannabis Sativa and Cannabis Indica.