Fiction that feels hopeful or optimistic?

I’m currently reading “Hope For Cynics” and I am loving the momentum it’s giving me to strive to be less of a grump and have a more positive outlook. I usually like to read one nonfiction and one fiction book at a time, so I’d like to stick to a theme of hope and optimism there too. Open to any genre, as long as it’s a book that made you feel good when you read it.