What book has ever made you simply happy?

I need feel-good books right now. I have never read a book that ever translated to that feeling of pure happiness or joy, which is a wonder. I have read books with happy endings, but the journey is just as important as the ending, and so is it really a happy book just because it has a happy ending? Not necessarily. What is a happy ending? What constitutes a happy book? Maybe it all just boils down to that feeling. The last few days have been anxiety-inducing for me. I don't want to think and I just want to immerse myself with books—cause it's all that I can do right now. I need a happy book, a book that simply is, a book that doesn't try.