20 years ago or so, I woke in the night with a crushing chest pain. My husband called an ambulance and because we had a young child, couldn't come with me. In the panic, neither of us thought to supply me with a book.
I was fine, but I was there for hours, getting tests and just lying there with nothing. What kept me from going completely mad was my obsession with this book, which I was able to “read“ from memory.