In his third book in the ``River Series,'' Lourie takes a 460- mile canoe trip from Whitehorse to Dawson, following the path of the Klondike gold prospectors of 1897. Text and photos of the contemporary journey are juxtaposed with those from the gold rush era to give a vivid picture of life, past and present, in the harsh environment near the Arctic Circle. As he did in Hudson River (1992), the author captures the spirit of a mighty river and its people. Powerful and beautifully presented. (Nonfiction. 9-12)