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.

Forest of Secrets is a children's fantasy novel, the third book in the original Warriors series, written by Cherith Baldry under the pen name of Erin Hunter. The plot is about Fireheart, a ThunderClan warrior, attempting to prevent his best friend Graystripe from falling in love with Silverstream, whom Graystripe is not allowed to fall in love with. Silverstream later dies giving birth to Graystripe's kits. When RiverClan claims the kits, Graystripe makes the difficult decision to join RiverClan. Fireheart also becomes deputy after Tigerclaw, the deputy, attempts to kill the leader, Bluestar. The main theme of the book is forbidden love. Forest of Secrets takes place in a fictional forest based on many natural locations.