Phillip Gwynne grew up in rural areas in Victoria and South Australia. He graduated from James Cook University with a degree in Marine Biology and has worked in many jobs in Australia and overseas.
Gwynne's first novel, Deadly, Unna? was widely praised for its contribution to Australia's young adult fiction, and won several awards, including the Victorian Premier's Literary Award (young-adult fiction), the Children's Peace Literature Award, and the Children's Books Council Book of the Year Award (older readers). The background of Australian Rules Football has made the novel's examination of race relations in rural Australia attractive to young male readers.
The film adaptation, Australian Rules, attracted controversy when members of a South Australian Aboriginal community complained about scenes depicting the death of two young Aboriginal people, arguing that Gwynne, who also wrote the screenplay, should not have appropriated the story from their community.
Despite the controversy, the film was nominated for several awards (and won the AFI Award for best adapted screenplay), and a sequel, Nukkin Ya, was written, attracting further praise and award nominations.
Gwynne wrote children's book The Worst Team Ever, between Deadly, Unna? and Nukkin Ya, and has since gone on to write a wide range of children's literature, including thrillers in the six-part The Debt series. He has also published the occasional picture book, including Little Owl and Brothers from a Different Mother.