Abbott, Charles D. Howard Pyle: A Chronicle. New York: Harper, 1925.

This is the standard biography.

Agosta, Lucien L. Howard Pyle. Boston: Twayne, 1987. Offers the most recent and most thorough critical introduction to the life, literary works, and illustrations of Howard Pyle.

Children's Literature Association Quarterly 8 (Summer 1983). "Howard Pyle Commemorative" edition, marking the publication centennial of The Merry Adventures of Robin Hood. A collection of critical essays on Pyle's life, career, and works.

Morse, Willard S., and Gertrude Brinckle. Howard Pyle: A Record of His Illustrations and Writings. 1921.

Reprint. Detroit: Singing Tree Press, 1969. A complete bibliography of Pyle's writings and illustrations.

Nesbitt, Elizabeth. Howard Pyle. London: Bodley Head, 1966. A brief survey of Pyle's life and work.

Pitz, Henry C. Howard Pyle: Writer, Illustrator, Founder of the Brandywine School. New York: Bramhall House, 1965. A biographical and critical survey, this source is especially strong in assessing Pyle's...