"With RiverClan in crisis, ShadowClan and its leader Tigerstar step in to offer their help-whether RiverClan wants it or not"--
Ages 8-12. Harper.|||Grades 4-6. Harper.|||juvenile
Erin Hunter.
"Erin Hunter is not one person, but a team of story writers, authors and editors who work together to create the series" -- from the Warrior Cats official website