Many revisions reflect recently developed methods for examining fish as well as parasites that have been discovered since the first edition was published in 1967. Hoffman, a retired research parasitologist with the US Fish and Wildlife Service, includes literature on foreign freshwater fish parasites that are likely to occur in North America; provides information on public health concerns about fish parasites; and lists known species of each genus along with reference citations, drawings, and photographic examples. Annotation c. Book News, Inc., Portland, OR (booknews.com)