The Great Bear: The Misewa Saga, Book 2 by David A. Robertson

From Puffin Books:

In this second book in the Narnia-inspired Indigenous middle-grade fantasy series, Eli and Morgan journey once more to Misewa, travelling back in time.

Back at home after their first adventure in the Barren Grounds, Eli and Morgan each struggle with personal issues: Eli is being bullied at school, and tries to hide it from Morgan, while Morgan has to make an important decision about her birth mother. They turn to the place where they know they can learn the most, and make the journey to Misewa to visit their animal friends. This time they travel back in time and meet a young fisher that might just be their lost friend. But they discover that the village is once again in peril, and they must dig deep within themselves to find the strength to protect their beloved friends. Can they carry this strength back home to face their own challenges?