In 1984 Adler wrote an article published in The New York Times, advocating a public shoreline path from the river's mouth at Battery Park to the river's source, Lake Tear of the Clouds in the Adirondack Mountains. Adler's book, Walking The Hudson, Batt to Bear (From the Battery to Bear Mountain) detailed the route, as of 1997, as far as Bear Mountain (Hudson Highlands). A second edition, published by W. W. Norton & Company updated the route for 2012. The book contains an introduction by folksinger Pete Seeger, a member of Shorewalkers and friend of Adler.