The Sign of Three. The Dark River

The thirteenth book of the "Warrior Cats" epic "The Sign of Three" tells how the prophecy once given to the leader of the Thunder Clan, Firestar, begins to come true: "Three will come, blood of your blood, and the power of stars will be in their paws." Many moons the clans have lived in their new territory. For three kits, grandchildren of Firestar, Lionkit, Hollyleaf, and Sparrowkit, the time has come to choose their fate. And if Lionkit is a born warrior, Hollyleaf must decide if she has the strength to become a healer. Blind Sparrowkit dreams of warrior glory, but why then is he given the gift of foresight and the ability to communicate with the Star Clan cats?...
The fourteenth book "The Dark River" tells of the harsh trials that the three young chosen ones will have to face. Lionpaw forms dangerous friendships - and not just one! - and must keep it strictly secret, Sparrowpaw explores the limits of his power and invisible connection with the Star Clan cats, and Hollypaw is ready to do anything to prevent war.