Erin Hunter 
Seekers #1: The Quest Begins 

The first book in a thrillinganimal fantasy series following the epic journey of three bears, from the #1 nationally bestselling author of Warriors.When three young bears from different speciesblack, polar, and grizzlyare separated from their families, fate brings them together on a path that will change their lives forever. Along the way, they will face great danger, terrible tragedies, new landscapes, and situations that require all their ingenuity to survive.For fans of Warriors, Survivors, and animal fantasy series like Wings of Fire and Foxcraft, Seekers is a sweeping and incredible journey through the beautiful, dangerous world of wild bears.