Seekers (Erin Hunter). Original series

The first book in a thrilling animal fantasy series following the epic journey of three bears, from the #1 nationally bestselling author of Warriors. When three young bears from different species-black, polar, and grizzly-are 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...

When the bears learn of the legendary Last Great Wilderness, a fabled bear paradise, they believe that this must be their ultimate destination.

Despite their misgivings about the many dangers that lie ahead, the bears venture out onto the Everlasting Ice and learn of their final destination with the help of a mystical bear spirit.