Erin Hunter is a collective pseudonym used by the authors Victoria Holmes, Kate Cary, Cherith Baldry, Clarissa Hutton, Inbali Iserles, Tui T. Sutherland, and Rosie Best in the writing of several juvenile fantasy novel series, which focus on animals and their adventures. Notable works include the Warriors, Seekers, Survivors, Bravelands, and Bamboo Kingdom book series. Each of the authors play a different role in the production of the books: Holmes creates the plot for each book, and the others take turns writing the books. Dan Jolley, though not an official Erin Hunter author, also writes the stories for manga published under the Hunter name.
In the year 2003, HarperCollins asked Victoria Holmes to write a fantasy series about feral cats, but, not being a reader of fantasy, she was less than enthusiastic, despite her love of cats. After writing one storyline, Kate Cary was brought in to write the book as Holmes went behind the scenes to supervise details and edit the book. Then, on the third book, Forest of Secrets, Cherith Baldry joined Erin Hunter. Later, after Sutherland wrote the first Warriors field guide, she became the fourth Erin Hunter.