Jones, J. Sydney. "Garth Nix." In Authors and Artists for Young Adults, vol. 27.

Detroit: Gale, 1999. In addition to biographical information, a list of awards, his bibliography, and information about Sabriel, this entry contains information about Shade's Children.

"Nix, Garth." In Something about the Author, vol. 97. Detroit: Gale, 1998. This entry contains biographical information, a list of awards, his bibliography, and information about Sabriel.

Raugust, Karen. "Licensing Hotline." Publishers Weekly (January 22, 2001): 184.

This article is a brief discussion of the release of The Seventh Tower series.