Poltavets, Eugene: - Eugene Poltavets, as a child was never truly interested in nature and biology in particular. Although he, together with his father and brother, spent a lot of time in the forests of the Karelian Isthmus. And only in adulthood, under the influence of his wife, genuine interest for nature came to him. The Poltavets began studying the application of fungi as one of the alternative methods of cancer prevention and treatment after the sudden death of Svetlana's younger sister a few years ago, who had been diagnosed with breast cancer. They studied literature, scientific data about the use of various types of fungi as an alternative method of treating severe forms of cancer and other diseases. The result of this was this work. The world of mushrooms is huge and diverse. This book covers just its tiny part.