Antczak, Janice. "The Visions of H. M. Hoover." Ch LA Quarterly, 10 (Summer 1985): 73-76. Although set in the future, Hoover's novels center on issues young readers will find relevant today.

Commire, Anne, ed. "Hoover, H(elen) M(ary)." In Something About the Author. Vol. 44. Detroit: Gale Research, 1986: 89-92. Somewhat dated, but still valuable. Contains Hoover's own opinions about her novels, although The Shepherd Moon is not mentioned.

Dunn, Thorn and Karl Hiller. "Growing Home: The Triumph of Youth in the Novels of H. M. Hoover." In Science Fiction for Young Readers. Edited by C. W. Sullivan III. Westport, CT: Greenwood Press, 1993. The most detailed examination of Hoover's fiction to date.

Hoover, H. M. "Details, Details." Horn Book 64 (May 1988): 590-592. Why historical fiction is more of a challenge to the writer than is science fiction.

——. "The Face of a Spider." In Innocence & Experience: Essays...