I am a hybrid, a part of two wholes
I became accomplished and then I was sold
But enroute to my new home
Down I rocketed to the frozen bowl
Encased in iron for three days
I lost the courage I had
Found at last by the land's man
I soon began to heal
Never before had I had such love
Harshness was all I had before
Just as was better, I was spirited away
To the home that was meant
Tis' place wasn't for me, wanted back north
With a friend's help, escaped, said up there I still had a chance
City streets and scraps, smarter than the rest
Then trapped again, and saved by me recent friend
Over summer whales we soon went
My trek was on again
Sadly released to the wilderness
Over places high and low
Eating hunted raw, facing ice and snow
Earned a love in a clever fight
Sadly soon she died
After endless time I was there
Back to my loving life
Killed my old enemy
Who had tormented me
And lived happily on at last
Who I am, and what lands have I journeyed?
And explain the title please!
Hint:
It’s a book.