The glory of this book is London's vivid descriptions of the Yukon and its inhabitants during the Klondike Gold Rush. I was pleasantly surprised to learn that he wasn't nearly as politically incorrect in his accounts of the natives as I'd feared he was -- he's no Kipling of the North -- but his descriptions of both people and places often seem fresh and insightful. That said, this book contains essentially all of his Yukon stories, and they are not ALL great -- worth reading thorough, nevertheless, but nothing surpasses "To Build a Fire" and "Call of the Wild." (Both of which are in this collection, of course.)
On the purely physical front, my paperback edition was poorly bound, and pages were falling out before I was 2/3 through it.