Sunset is a fantasy novel, the sixth and final book in Erin Hunter's Warriors: The New Prophecy series.

The book begins with the group of cats known as ThunderClan rebuilding its camp with the help of its old friends Stormfur and Brook following a badger attack in Twilight.

Brambleclaw manages to convince ThunderClan leader Firestar to choose a new deputy to replace the long missing Graystripe and is surprised when he is chosen.

During a visit to the Moonpool, where medicine cats share dreams with StarClan each month, former medicine cat Spottedleaf goes to Leafpool in a dream and shows her that Cinderpelt is reborn in the form of Cinderkit, one of Sorreltail's four kits whom Cinderpelt died protecting.

After months of waiting and with persuasion from multiple characters, Firestar, leader of ThunderClan, finally declares that his friend and deputy Graystripe is not going to return after being abducted by humans in Dawn.

The matter is cleared when Firestar declares that Brambleclaw will mentor Berrykit when the kit turns six months of age and mentions Leafpool's dream from StarClan to his warriors.

The reviewer closed by saying that while not well-written and difficult to understand without knowledge of previous books, Sunset was still entertaining.

[7] Booklist praised the book, saying, "As series fans will expect, the action here proves as compelling as the relationships between cats and the dynamics among the clans".