The midnight library by Matt Haig is about a 35-year-old woman who attempts suicide but fails, but on the process, she wakes up a library, that library is between life and death. In that library there is infinite books, and each one of them are her life, but in different. scenarios whenever she opens a book, she can go into it and life the life she is living in that book.
you have many lives as you have possibilities, there are lives where you make different choices. And those choices lead to different outcomes. if you had done just one thing differently, you would have a different lifetime story. and they all exist in the midnight library. They are all as real as life.
I like this book so far because I like how it illustrates life, and how any choice you make can change your entire life.