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. For each book, Holmes creates the plot 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. James L. Barry, Bettina M. Kurkoski, and Don Hudson are included under the pseudonym as the illustrators of the Warriors mangas. Natalie Riess and Sara Goetter are also included as the illustrators of the upcoming graphic novel adaptation of The Prophecies Begin.

Seekers is a novel series written by Tui T. Sutherland and Cherith Baldry under the pseudonym Erin Hunter, who also wrote the Warriors series. Seekers follows the adventures of four bear cubs: Kallik, Lusa, Ujurak, and Toklo. Led by Ujurak, the four bears search for a place where they can live in peace without human interference and harassment. The first book of the first series, The Quest Begins, was released on 27 May 2008 and was followed by five other books, ending with the last book of the first series, Spirits in the Stars, which was released on 8 February 2011. A second series of novels subtitled Return to the Wild, also six books in length, began publication with Island of Shadows, released on 7 February 2012. The series has been well received, with critics praising the realistic behavior of the characters, the world building, and the book's themes surrounding environmentalism.