from the National Wildlife Federation. In 1983, Boyle simultaneously published two books: Acid Rain, which highlighted the threat to wildlife and ultimately human health attributed to acid rain "caused by the emission of sulfur dioxide and nitrogen oxides from the combustion of fossil fuels"; and At the Top of Their Game, a collection of essays about people driven to achieve great things, including profiles of tennis official Jimmy Van Alen, novelist Zane Grey, dog trainer Robert Abady, handballer Jimmy Jacobs, and fly fisherman Charles E. Brooks. Boyle ended his 34-year affiliation with Riverkeeper in 2000, following a dispute with the organization's attorney, Robert F. Kennedy Jr., over Kennedy's hiring of a scientist with a criminal record. Boyle's last book, published in 2006, was Dapping, the Exciting Way of Fishing Flies that Fly Quiver and Jump. Personal life and death Boyle married Jane Crosby Sanger, with whom he had a daughter and two sons. Jane died in 1975, and Boyle later married Kathryn Belous, who survived him. Boyle died of cancer at the age of 88 in Cooperstown, New York. Notes References 1928 births 2017 deaths American writers American environmentalists Trinity College (Connecticut) alumni