Garth Nix was born in 1963 in Melbourne, Australia. A full-time writer since 2001, he has worked as a literary agent, marketing consultant, book editor, book publicist, book sales representative, bookseller, and as a part-time soldier in the Australian Army Reserve. Garth's books include the award-winning Old Kingdom fantasy novels Sabriel, Lirael, Abhorsen, and Clariel, and most recently, Goldenhand. He has also written the science fiction novels Shade's Children and A Confusion of Princes. His fantasy novels for children include The Ragwitch; the six books of The Seventh Tower sequence; The Keys to the Kingdom series; and with Sean Williams, the Troubletwisters books and Spirit Animals: Blood Ties. More than five million copies of Garth's books have been sold around the world, his books have appeared on the bestseller lists of the New York Times, Publishers Weekly, and the Guardian, and his work has been translated into 40 languages. He lives in Sydney, Australia. Follow Garth on twitter at @garthnix or at www.garthnix.com Sean Williams is the author of thirty-five novels, eighty short stories and the odd odd poem. He writes across the field of science fiction and fantasy for adults, young adults and children, and enjoys the occasional franchise, too, such as Star Wars and Doctor Who. His work has won awards, debuted at #1 on the New York Times hardback bestseller list, and been translated into numerous languages. His latest series is Troubletwisters, co-written with Garth Nix. Visit him online atwww.seanwilliams.com