Our Friends and Our Foes of the Invisible World: Microbes, Good and Bad By Hershey, Harvey Books / Hardcover Nature › Animals Publisher: Thomas Y. Crowell Company, January 1913 Price $21.94 Free Shipping Send to a friend Used - Good Good condition. Front hinge and binding cracked. $21.94 1 in Stock at Warehouse Quantity Add Free Shipping to continental U.S. OR $1.00 per item discount if shipped to store.