Garth Richard Nix is an Australian writer born on 19 July 1963, who specialises in children's and young adult fantasy novels. He is best known for his popular series such as Old Kingdom, Seventh Tower, and Keys to the Kingdom.

Garth has often been asked if his name is a pseudonym, to which he humorously responds that it sounds like the perfect name for a writer of fantasy, but indeed, it is his real name.

Nix was born in Melbourne, Australia, amidst the lively tunes of a Salvation Army band. He moved to Canberra at an early age and resided there until the age of nineteen, after which he embarked on a journey to the UK with a typewriter and numerous books in tow. His adventures included driving a beat-up Austin, which somehow survived a wheel falling off.

Upon returning to Australia, Nix completed his degree at the University of Canberra in 1986, before diving into various roles within the literary world. His career path included jobs as a bookseller, book publicist, publisher's sales representative, editor, and even a part-time soldier in the Australian Army Reserve.

Since 2001, Garth Nix has been a full-time writer. His acclaimed works include the Old Kingdom fantasy series: Sabriel, Lirael, Abhorsen, Clariel, Goldenhand, and Terciel and Elinor; science fiction novels such as Shade’s Children and A Confusion of Princes; fantasy novels Angel Mage and The Left-Handed Booksellers of London; and the magical Regency romance Newt’s Emerald.

His children's novels include The Ragwitch, the six-part The Seventh Tower sequence, The Keys to the Kingdom series, and Frogkisser!.

Nix's short fiction comprises more than 60 stories, some of which are compiled in Across the Wall and To Hold the Bridge. Collaborating with Sean Williams, he co-authored series such as Troubletwisters, Spirit Animals Book Three: Blood Ties, Have Sword, Will Travel, and Let Sleeping Dragons Lie.

Over six million copies of his books have been sold globally, appearing on bestseller lists like The New York Times and Publishers Weekly, and translated into 42 languages. His accolades include multiple awards such as the Aurealis Awards, Ditmar Award, and Mythopoeic Award, among others.