“A young polar bear learns how to hunt and survive during seasonal changes. In this fourth in her observational documentary-style series (Tiger's Story, 2007, etc.), Blackford turns her attention toward a polar bear cub struggling to find food. When Polar Bear first tumbles out of her mother's den, all she wants to do is play. But Polar Bear's mother is hungry. She teaches her young cubs how to hunt. Polar Bear grows and begins to hunt more on her own. But it is difficult. With temperatures warming, the ice melts, and she cannot find any seal breathing holes. Walruses are too big for Polar Bear to tackle, and even another predator's leftovers have many others staking their claim. Suspenseful moments heighten the drama, urging readers to feel Polar Bear's plight. Tight, close-up perspectives further create an emotional connection. Predictably, large swathes of Arctic white cover most of the pages, but Stojic infuses sun-drenched skies with deep reds and yellows and varies the shades of blue to diversify the palette. While Polar Bear's specific story ends hopefully, an author's note briefly discusses global warming and the effects on polar regions. "A science primer for the youngest environmentalists.” —Kirkus