The best of London's famed (semi-fictional) novels of adventure, including his most famous: the 1903 tale of the dog Buck and his master, John Thornton, struggling in the wilderness. Apart from its literary themes, the book is rich in details of history and geography, flora and fauna -- and it gives an awful lot of information about Klondike sled dogs. A Penguin 20th Century Classic.  (ARC10, $7.95)