Im lucky enough to work with, I think, the greatest writer theres ever been, Shakespeare. Whose collected works would always be under my pillow if I was only ever allowed one book to keep, and who never bores me.
Books don't exist unless you read them. And it's a two way process - you write the book as you read it and you fill in the gaps. You discover it and you put the marks together and without you doing it they're just marks.