This is the fifth volume in the widely acclaimed Facts on File Animal Series. "The Encyclopedia of Insects" is sure to be received with the same enthusiasm that greeted the previously published volumes. "The Encyclopedia of Mammals, " for example, has been described as "the most thorough of its kind in print...the ultimate source-reference work on mammals of the world" by UPI and "an extraordinary book whose content and execution are of the highest quality" in "Library Journal." "Mammals" was selected in 1984 by the American Library Association as an outstanding reference source in the Science category. Roger Tory Peterson said of "Encyclopedia of Birds: " "world-wide in scope, will be consulted often not only by scholars but also by everyone who wishes to be properly informed about birds and they way they live."