Gray, Nicholas Stuart. The Boys. New York: Meredith Press, 1969. This nonfiction work is an informal account of various cats who have lived in Gray's household. It gives some biographical information and another example of how Gray describes cats.

Greaves, Margaret. "Nicholas Stuart Gray." In Twentieth-Century Children's Writers, edited by D. L. Kirkpatrick.

New York: St. Martin's, 1983. This article gives some biographical information, a list of Gray's writings and theatrical activities, and an evaluation of his work. Greaves focuses on several novels and stories in order to illustrate characteristics of Gray's writing.

Wintle, Justin, and Emma Fisher. The Pied Pipers. New York: Paddington Press/Two Continents, 1974. This book contains an interview with Gray that gives insight into his feeling about using traditional stories and the importance of fantasy literature.