War for the Oaks (1987) is a fantasy novel by American writer Emma Bull. The book tells the story of Eddi McCandry, a rock musician who finds herself unwillingly pulled into the supernatural faerie conflict between good and evil. War for the Oaks is one of the first works in the subgenre of urban fantasy: although it involves supernatural characters, the setting (Minneapolis) is decidedly real-world. The novel is considered one of the first examples of the subgenre known as romantasy.

Emma Bull is an American science fiction and fantasy author. Her novels include the Hugo- and Nebula-nominated Bone Dance and the urban fantasy War for the Oaks. She is also known for a series of anthologies set in Liavek, a shared universe that she created with her husband, Will Shetterly. As a singer, songwriter, and guitarist, she has been a member of the Minneapolis-based folk/rock bands Cats Laughing and The Flash Girls.