Walk with a wolf in the cold air before sunrise. She moves, quiet as mist, between spruce trees and birches. Far north, in the wilds of the Yukon Territory, a wolf slides between boulders and trots over pebbles to get to the lake. Plunging through slushy ice to get to the water, she drinks her fill and then shakes herself dry. She howls, and waits for a response. Following the sound, she goes to join her mate, their four cubs, and the rest of the pack. Together they stalk and attack an old bull moose for food. When their hunger is satisfied, they curl up to sleep. The wolf dreams of the coming spring, when she will walk with her cubs in the sun. Told in poetic language and illustrated with evocative watercolors, this science-based picture book could stand alone as fiction, but it extends its use well beyond that. Italicized text, separate from the narrative, supplies facts and explanations about wolf behavior, family structure, and dietary needs, as well as the relation of wolves to dogs in the canine family. Encourage students to practice their index-using skills by looking up areas of particular interest.