Eclipse is the fourth book in Erin Hunter's Warriors: Power of Three, and was widely released on September 2, 2008. It is the fourth book in what is the third six-book series of the Warriors series. Like the three previous books in the series, it centers on the grandchildren of the ThunderClan leader Firestar: Jaypaw, Hollypaw, and Lionpaw, who have been blessed with extraordinary powers. Mostly, the book centers on the three coming to terms with their powers, and the prophecy that predicts they will someday be more powerful than StarClan.