You gorilla like this... (sorry, couldn't resist)
I bought this book on sale to listen to with my kids while driving. My son liked the title and premise, so he and I listened to it on our way to and from twice-weekly summer soccer sessions.
My boy loved it. At first, I did not think I was going to like it, though. I can't remember now what it was I initially objected to. But the story really redeemed itself before it was half over, and I wound up loving it, too. I'll never forget that when the story finished, he and I sat in silence. I don't know if his reason was the same as mine, but I was close to tears.
The One and Only Ivan is a poignant children's story that adults will love, too. It contains wonderful messages about friendship, integrity, empathy, and grit. I highly recommend it to parents. It will appeal to both boys and girls.