I just finished an audiobook of the book,
Emory's Gift, by W. Bruce Cameron. It is about a young boy, Charlie, who is saved from a mountain lion by a grizzly bear. Charlie and the bear then befriend each other (yes, 'willing suspension of disbelief' is needed here). The book also goes into Charlie's life then: the loss of his mother, his father's distance, and Charlie's life at school, with its social difficulties and him learning about love.
This was a really good book, and I 'couldn't put it down' (I kept going the long way to places in my car

). The audiobook was read by the author, and I was a bit worried about that at first, wondering how I would like that. But, he was a really good reader--he had a nice deep voice, and I think he did a good job with the voices.
I think this book is technically an 'adult' book, but I wonder if it could be a 'young adult' book (its Charlie as a man talking about when he was thirteen).
I highly recommend it
Here's a link to the Amazon page for it (which may have spoilers):
Samfan
"It's got so much chalk in it I'm not sure if we should eat it or write with it."
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"What are you going to do for the rest of your life, fish? There's bigger fish to be caught here."