Paul Henry de Kruif (March 2, 1890 in Zeeland, Michigan – February 28, 1971 in Holland, Michigan) was an American microbiologist and author of Dutch descent. Publishing as Paul de Kruif, he is most noted for his 1926 book, Microbe Hunters. This book was not only a bestseller for a lengthy period after publication, but has remained high on lists of recommended reading for science and has been an inspiration for many aspiring physicians and scientists.He graduated from the University of Michigan with a bachelor's degree (1912) and remained to obtain a Ph.D. (1916). He immediately entered service as a Private in Mexico on the Pancho Villa Expedition and afterwards served as a Lieutenant and a Captain in World War I in France. Because of his service in the Sanitary Corps, he had occasional contacts with leading French biologists of the period. Wikipedia