This collection is gathered around a single theme—that of a child or teen warrior. Giving its contributors a wide berth, the editors have permitted a flourishing of some fabulous ideas. As is nearly always true of such things, however, the stories range widely in focus and power. Some are dark: Holly Black’s “Heartless,” wherein a girl who scavenges from the fallen in battle at last finds death too much; some are gentle and funny, like Esther Friesner’s spirited and tough young Helen of Troy or Mike Resnick’s truce between boy and dragon. Tamora Pierce herself offers the origins of the Shang Unicorn from her Lioness stories, and Margaret Mahy’s tale of a magician and his unexpected warrior surprises and delights. One of the strongest entries is by Lesley McBain, who expertly weaves a circle of Irish Celtic magic around a refugee from the Holocaust. Each story is followed by a paragraph of biography for its author. Pierce energetically writes the introduction and Sherman offers a few historical bits about young warriors in the afterword. (Short stories/fantasy. 12+)