Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Thousands of mushroom species are widely distributed all around the world, however, amidst edible species there are approximately 100 poisonous and 15-20 deadly mushroom species. According to specialists, the majority of mushroom toxicity cases are caused by misidentification of mushrooms. Learn more about mushroom poisoning, its causes as well as the species of deadly and poisonous mushrooms in this book.