With the new edition of both works in one volume, the classic writings of the great naturalist Raoul H. Francé are once again available after many years. Raoul H. Francé (1874 - 1943), one of the greatest biological researchers, discovered the communities of life in the soil, consisting of microorganisms and larger soil animals such as millipedes and earthworms. His lifelong studies under the microscope and in the laboratory, as well as his worldwide research trips, led to insights that he presented in "Das Edaphon" ("The Living in the Soil") in a scientifically accessible manner and in "Das Leben im Boden" in a narrative form, accompanied by many nature drawings. These texts, intended for all those interested in natural history and agriculture, in this dual volume, are based on the author's nature drawings and reflect the infinite complexity of the soil ecosystem.