"Omen of the Stars" is the fourth arc in the popular book series Warriors by Erin Hunter. This series follows the adventures of wild cats living in clans, focusing on their struggles, friendships, and battles. The arc consists of four main books: "The Fourth Apprentice," "Fading Echoes," "Night Whispers," and "Sign of the Moon." In "Omen of the Stars," the story centers around the rise of a new threat to the clans, as well as the emergence of a powerful prophecy. Key characters, including Jayfeather, Lionblaze, and Hollyleaf, navigate their destinies while facing challenges that test their loyalty and courage.