The polar bear, king of the Arctic, is one of the world's most recognizable animals. Images of the majestic beasts roaming across the ice cap, plunging into frigid waters, and playing with furry cubs have come to symbolize the beauty and grandeur of the Arctic. .Through informative and engaging language, Derocher carefully explains the sea ice ecosystem that is essential to the survival of polar bears. He addresses the threat of global warming to the Arctic-home to polar bears for tens of thousands of years-and describes in impressive detail their feeding habits, distribution, den ecology, and reproduction.