Mommy, where do books come from?
Well, when a person has a story to tell, she writes it down and sends it to a publisher, and the publisher makes a bunch of copies, and binds the pages together with glue and string, and then he sends them to bookshops for us to buy.
But Mommy, where do stories come from?
Go ask your father.
Where do you get your stories? This is not a rhetorical question!