 It turns out to be an unexpected challenge, full of new friends and mysterious dangers.During the novel Katherine is befriended by several recurring characters from other L'Engle novels, including Mimi Oppenheimer from "A Winter's Love", Josiah "Dave" Davidson from "The Young Unicorns", and Suzy Austin (now Dr. Suzy Davidson) from the Austin family series (which L'Engle called her "Chronos" novels).The Cathedral of Saint John the Divine, which figures prominently in the plot of "A Severed Wasp", is also the setting for the 1968 L'Engle novel "The Young Unicorns".