Having a hard time, please suggest me a book that’s like an antidote to hopelessness and will make me see the beauty of life

I've been really struggling lately, and could really use a little hope and beauty in my life. has anyone ever read a book that made them feel alive again? Like the world holds infinite possibilities? I used to naturally feel that way as a kid, but now as a grown up, the future just feels really bleak. I want to find some color again. Thanks for your help!