The National Forest Service transferred Aldo Leopold to Madison, Wisconsin, in 1924. In 1933 he published the first text book in the field of wildlife management, and that same year he accepted a position at the University of Wisconsin as chair of the new game management department, the first in the nation. In 1935, he and his family initiated their own ecological restoration experiment on a worn-out farm along the Wisconsin River outside of Baraboo, Wisconsin. During weekends at “the Shack,” the family planted thousands of pine trees and restored prairies. Documenting the ensuing changes in the flora and fauna further informed and inspired Leopold. He died of a heart attack while helping a Baraboo neighbor put out a fire on April 21, 1948, one week before he would have learned that his manuscript for Sand County Almanac had been accepted for publication. With sales of more than two million copies, it is one of the most influential books on environmentalism ever written.