Garth Nix has been involved in writing for decades after graduating from the University of Canberra with a Bachelor's degree in Professional Writing in 1986. Afterward, he worked at a bookshop before becoming a sales rep and publicist at HarperCollins, where he was named senior editor in 1991.
Nix spent the early 1990s traveling Europe and Asia before entering public relations with his own firm, Gotely Nix Evans Pty Ltd. In 1999, Nix joined Australian literary firm Curtis Brown as a part-time agent before returning to full-time writing in 2002, following the success of Old Kingdom and Seventh Tower Series.
In 1990, while working for HarperCollins, Nix published his first book, The Ragwitch. Five years later, Nix published Sabriel which won the Aurealis Award for Best Fantasy Novel and Best Young Adult Novel. Nix's success continued with 1997's Shade's Children, which was chosen as an American Library Association Best Book for Young Adults and was shortlisted for the Aurealis Awards and the Heartland Prize.
Nix started the Seventh Tower Series in 2000 with The Fall, Castle, Aenir, and Above the Viel. The series ended in 2001 with Into Battle and The Violet Keystone. In 2001, Nix also returned to the Old Kingdom of Sabriel with Lirael: Daughter of the Clayr, followed by 2003's Abhorsen.
Nix's books have been published across the world in more than thirty languages. He is working on a screenplay of Sabriel as well as a fourth novel in the Old Kingdom series.
He and his wife, Anna, live on the beach in Sydney, where Nix has settled into his career as a full-time writer.