A Dangerous Path (Warriors)

A Dangerous Path is the fifth book in the "Warriors" series by Erin Hunter. It focuses on a cat named Fireheart, who is a member of a group of cats called ThunderClan.
Plot.
Fireheart to struggle to care for ThunderClan, one of the five warrior Clans in the forest. Tigerstar, leader of ShadowClan tries to destroy ThunderClan. ThunderClan's leader, Bluestar, is no help at all, because she has gone insane from Tigerstar's previous betrayal. Tigerstar plans to use a pack of dogs to kill ThunderClan. He kills rabbits in ThunderClan territory, and leaves a trail from some rocks to the ThunderClan camp, with the body of a cat named Brindleface at the end, in order to lure the dogs to kill the warriors of ThunderClan. Once Fireheart discovers this, he takes ThunderClan to hide. A line of fast warriors lead the dogs to their deaths in a gorge (a hole that goes very far down, with water at the bottom). Fireheart is the last in line, and has a good run until Tigerstar leaps out of a bush and holds Fireheart down, letting the dogs catch Fireheart. Fireheart is trapped by the lead dog, but is rescued by Bluestar. She runs into the lead dog, who releases Fireheart, and the two fall down into the gorge. Fireheart saves Bluestar from the gorge and brings her to the shore, where she dies. Fireheart is filled with sadness for his dead leader, and he is scared because he must become the new leader of ThunderClan.