Notes running before and after this true story inform beginning readers of the facts about the Blizzard of 1888, a three- day storm that ravaged the northeastern US. Milton Daub, 12, leaves his home in the South Bronx to buy milk, wearing the snowshoes he and his father have patched together from odds and ends around the house, with a picture from a geography book as a guide. As neighbors in need shout requests for groceries and medications to Milton from their snow-banked, second-story windows, the boy's mission grows. At day's end, he is not only able to turn his unasked-for profits over to his mother but has also saved a life. Wetterer (Kate Shelley and the Midnight Express) and her co-author craft a satisfying volume in the On My Own series, building suspense as the snowshoes disintegrate; Young's illustrations wonderfully evoke old New York City and the storm of a century. (Fiction. 5-8)