Glenn Hoffman was one of the world's foremost authorities on the parasites of fishes. This book narrates his life and 65-year professional career as a scientist, researcher, ambassador, colleague, and family man, and gives a glimpse inside the mind of a American scientist of the first rank. Born in 1918 to "hard working Iowa farm folks, " Dr. Hoffman studied zoology at the University of Iowa, served in the U.S. Army 1942-46 as a lab technician, bacteriologist, and parasitologist in France, England, Germany, and Belgium, earned his PhD in 1950, and taught at the University of North Dakota 1950-1957. From 1958 until his retirement in 1985 he worked for the U.S. Fish & Wildlife Services in Leetown, WV, and in Stuttgart, Arkansas, . He wrote four major books and more than 100 articles on the causes, spread, and cures of parasite-related diseases in fish, including Parasites of North American Freshwater Fishes (1967, 2nd ed. 1999), called "the bible of American fish parasitology.