Hans Zinsser (November 17, 1878 – September 4, 1940) was an American bacteriologist and a prolific author. He was the author of over 200 books and medical articles, and was a member of a number of scientific and medical organizations. Dr. Zinsser was also a published poet, having some of his verses printed in the Atlantic Monthly, now known as "The Atlantic". His 1940 autobiography, As I Remember Him: the Biography of R.S., won one of the early National Book Awards, the sixth and last annual award for Nonfiction voted by members of the American Booksellers Association.