For those who wonder how sleep comes, here’s the answer: It is due to the magical sand the tiny and daring Sandman, Tor, grinds from a dragon’s scale and sprinkles over sleepless children each night. While the mythical beast sleeps, the little old man braves the fire-breathing dragon’s lair, waiting for a chance to retrieve any scales that may pop off into the dust. Fletcher’s fantasy narrative fleshes out the familiar trope by combining worlds of fairy-tale-forest settings with average household bedtime environments. Much like a Santa Claus figure, each evening Tor rides through children’s bedroom windows on his miniature mouse-drawn button-wheeled cart to spread his sleep-inducing emerald sparkle-dust. Cowdrey’s deeply colored acrylics of flora, fauna, one frightfully greenish and nostril-smoking dragon, workshop scenes and angelically dozing children alternate with black-and-white images of a cherubic dimple-chinned bald and white mustachioed tiny gentleman hard at work. Bedtime fodder for the slightly older, wide-eyed and wakeful preschooler. (Picture book. 4-6)