"Black Widow" is the name of the poisonous karakurt spider in many countries. His life is surrounded by a halo of mysteries and mysteries. The author - a biologist and writer-naturalist - deeply studied the life of this peculiar inhabitant of the desert, found a new simple way to treat his bite. In an entertaining essay form, it also tells about other spiders and arachnids living in Kazakhstan, including those first discovered and described by the author. The book is addressed to the mass reader.