Warriors: The Darkest Hour is book six in the first Warriors series. With Tigerclaw now in command of Shadowclan, and Leopardstar, Riverclans leader to help him form Tigerclan. But to force Windclan and Thunderclan to join him, Tigerstar brings a new threat to the forest: Scourge, leader of Bloodclan. Will Firestar, leader of Thunderclan be able to stop this evil threat, or will blood rule the forest. To stop Scourge from taking all of the clans territory, Windclan and Thunderclan must unite to be Lionclan, and fight against Bloodclan and its ferocious leader. But the two clans will need to unite also with Riverclan and Shadowclan. But will they chose to fight or flee and try to cross high stones, for the only way to avoid battle is to leave their very homes. But after Tigerstar is killed by scourge, will Riverclan and Shadow clan be brave enough to fight this mighty new enemy?