Thunder Rising (Warriors: Dawn of the Clans, Bk.2)

You will make things right.
When the time comes, I know you will.

Tensions between the cats from the mountains are rising in their new territory--and the once firmly united group has split in two. Caught in the middle is a young cat named Thunder. Rejected by his father, Clear Sky, Thunder has thrived under Gray Wing's watchful eye. But when Clear Sky invites him to join the camp in the forest, Thunder will be forced to decide between the bonds of loyalty and the ties of blood.