War Of The Animals (Book 4): Azaz, King of Kings - War Of The Animals, #4

The War of the Animals series is an animal bible that chronicles the rise and fall of animal civilization over ten generations. In Book 4, Azaz, King of Kings, a young grizzly cub fights for his life after hunters murder his mother before his very eyes. The newly awakened bears, fearing retribution, exile Azaz and his father for murdering humans. Military hunters capture Azaz and experiment on him.
The experiments create a monster of untold strength. Azaz's father leads an attack on the military base, freeing Azaz. The military fatally shoots Azaz's father. Azaz vows revenge. The grizzly king conquers one bear clan after another until there is only one ruler, Azaz, king of kings. Azaz ignites a war with humanity that will change the face of history.