Norbert Rosing provides all new photography for this second edition of his sumptuous and informative volume showcasing not only the photogenic bears and their cubs but also the sly Arctic fox, sleek seals, ungainly walruses, myriad seabirds and glimmering aurora borealis. Accompanying essays describe life in Churchill and the author's own experiences traveling and working in the Hudson Bay.  (ARC50, $29.95)