Mycology is the branch of biology that is concerned with the study of fungi, their genetic and biochemical properties, their taxonomy and applications for human use. Fungi can be both harmful and beneficial to humans. Fungi produce antibiotics, toxins and secondary metabolites. They can cause toxicity or infection, but they can also be a source of tinder, food, medicine and entheogens. Many species of mushrooms are cultivated for food, such as button mushrooms, Portobello mushrooms, oyster mushrooms and shiitakes, besides many others. Penicillin, lovastatin, griseofulvin, etc. are some drugs produced using fungi. Many varieties of fungi are used for the industrial production of vitamins, antibiotics and cholesterol-lowering drugs. Fungi can also be useful in suppressing plant pathogens like weeds, insects, mites, etc. in agriculture. This book provides comprehensive insights into the field of mycology. It aims to shed light on some of the unexplored aspects of this field. This textbook is appropriate for those seeking detailed information in this area.