Golueke, Clarence G., Ph.D. Composting:  A Study of the Process and its Principles. Emmaus:  Rodale Press, 1972.  Golueke, writing in “scientific” says much of what my book does in one-third as many words that are three times as long.  He is America’s undisputed authority on composting.

Hopkins, Donald P. Chemicals, Humus and the Soil. Brooklyn:  Chemical Publishing Company, 1948.  Any serious organic gardener should confront Donald Hopkins’ thoughtful critique of Albert Howard’s belief system.  This book demolishes the notion that chemical fertilizers are intrinsically harmful to soil life while correctly stressing the vital importance of humus.

Hopp, Henry. What Every Gardener Should Know About Earthworms. Charlotte, Vermont:  Garden Way Publishing Company, 1973.  Hopp was a world-recognized expert on the earthworm.

Howard, Albert and Yeshwant D. Wad. The Waste Products of Agriculture:  Their Utilization as Humus. London:  Oxford University Press, 1931.  Many organic gardeners have read Howard’s An Agricultural Testament, but almost none have heard of this book.  It is the source of my information about the original Indore composting system.

An Agricultural Testament. London & New York:  Oxford University Press, 1940.  Describes Howard’s early crusade to restore humus to industrial farming.

The Soil and Health. New York:  Devin Adair, 1947.  Also published in London by Faber & Faber, titled Farming and Gardening for Health or Disease. A full development of Howard’s theme that humus is health for plants, animals and people.

Howard, Louise E. The Earth’s Green Carpet. Emmaus:  Rodale Press, 1947.  An oft-overlooked book by Howard’s second wife.  This one, slim volume expresses with elegant and passionate simplicity all of the basic beliefs of the organic gardening and farming movement.  See also her Albert Howard in India.

Kevan, D. Keith. Soil Animals. London:  H. F. & G. Witherby Ltd., 1962.  Soil zoology for otherwise well-schooled layreaders.

King, F.H. Farmers of Forty Centuries or Permanent Agriculture in China, Korea and Japan. Emmaus:  Rodale Press, first published 1911.  Treasured by the organic gardening movement for its description of a long-standing and successful agricultural system based completely on composting.  It is a great travel/adventure book.

Koepf, H.H., B.D.  Petterson, and W. Shaumann. Bio-Dynamic Agriculture:  An Introduction. Spring Valley, New York:  Anthroposophic Press, 1976.  A good introduction to this philosophical/mystical system of farming and gardening that uses magical compost inoculants.

Krasilnikov, N A. Soil Microorganisms and Higher Plants. Translated by Y.A.  Halperin.  Jerusalem:  Israel Program for Scientific Translations, 1961.  Organic gardeners have many vague beliefs about how humus makes plants healthy.  This book scientifically explains why organic matter in soil makes plants healthy.  Unlike most translations of Russian, this one is an easy read.