Pfeiffer's Introduction to Biodynamics.
Ehrenfried Pfeiffer was a pioneer of biodynamics in North America.
This short but comprehensive book is a collection of three key articles introducing the concepts, principles and practice of the biodynamic method, as well as an overview of its early history.
The book also includes a short biography of Ehrenfried Pfeiffer by Herbert H. Koepf.
Softcover, 87 pages