unlike contemporaries such as edward abbey and annie dillard, who tended to identify mainly with more mainstream genres like the novel, he has continued to identify himself mainly as a non-fiction nature writer and his major books have been in that genre—the latest being chuckwalla land (2011), articulate earth (2014), and mountains and marshes (2015). wallace has also been categorized as a science writer, and his work contains much scientific information, but it also has folkloric, philosophical, and religious dimensions. this has led to controversy, as when a march 20, 1983 new york times book review piece on his third book, the klamath knot, by then times reporter clifford may, accused him of playing "fast and loose" with concepts like evolution and mythology, getting "caught up with what are apparently attempts to alchemize science into poetry." on the other hand, the eminent botanist and co-founder of the "neo-darwinian synthesis," g. ledyard stebbins, described the klamath knot as: "a classic of natural history that will take its place alongside walden and a sand county almanac."