"Marrying exemplary sequential storytelling, mythology, and science and enhanced through respectful anthropomorphizing, Waluk takes readers into a realistic world of polar bears endangered by climate change. Waluk, a young, motherless cub, joins old and grizzled Manitok, who guides the little bear through an ever-shrinking habitat with dwindling food. It also doesn''t hurt that Waluk is a nimbler hunter, if a little more impatient, than Manitok. Miralles'' colorful, detailed art covers a wide territory, from the sweet, mismatched companions and their occasionally blood-tinged meals to the garment-bundled humans who pass into their territory; from Waluk''s vision of Nanook, the polar-bear deity, in the aurora borealis to the wise bear council that gathers to rescue Manitok from captivity. Meanwhile, Ruiz manages to write a story halfway between fact and fable, with a touching emotional element and meaningful information about global climate change. Like Brian K. Vaughan''s Pride of Baghdad (2006) and Rachel Hope Allison''s I''m Not a Plastic Bag (2012), this is a beautifully told tale of the impact humans have on wildlife and the environment." -Booklist