Once Were Warriors is New Zealand author Alan Duff's bestselling first novel, published in 1990. It tells the story of an urban Māori family, the Hekes, and portrays the reality of domestic violence. It was the basis of a 1994 film, directed by Lee Tamahori and starring Rena Owen and Temuera Morrison, which made its US premiere at the Hawaii International Film Festival. The novel was followed by two sequels, What Becomes of the Broken Hearted? (1996) and Jake's Long Shadow (2002).

Beth Heke left her small town and, despite her parents' disapproval, married Jake "the Muss" Heke. After 18 years, they live in a slum and have six children. Their interpretations of life and being Māori are tested. Since Beth is from a more traditional background, she relates to the old ways, while Jake is an interpretation of what some Māori have become. Beth sometimes tries to reform herself and her family - for example, by giving up drinking and saving the money which she would have spent on alcohol. However, she finds it easy to lapse back into a pattern of drinking and irresponsibility. The family are also shown disconnected from Western culture and ways of learning. Beth reflects that neither she nor anyone else she knows has any books in their home, and her daughter, Grace, is the only character with a real interest in school and learning. (This disconnection from books and education is a major concern of Duff's, for which reason he founded the charity Duffy Books in Homes, which gives free books to children from poor backgrounds and generally encourages reading).