Erin Hunter -- "Warriors: Dawn of the Clans #1: The Sun Trail"

For many moons, a tribe of cats have lived peacefully near the top of a mountain. But prey is scarce, seasons are harsh, and their leader fears they will not survive. When a vision reveals a bountiful land, a group of brave cats set off in search of a better home. In this unfamiliar world, faced with loners and fierce rogues all vying for territory and power, the traveling cats must find a new way to live side by side--or risk tearing one another apart.

*The Sun Trail will be on sale 3/5/13*