Authors:

...when all the openings were closed, then the worlds would all be restored to their proper relations with one another, Lyra’s Oxford and Will’s would lie over each other again, like transparent images on two sheets of film being moved closer and closer until they merged–although they would never truly touch.

Philip Pullman (2007). “The Amber Spyglass”, Knopf Books for Young Readers
...when all the openings were closed, then the worlds would all be restored to their proper relations with one another, Lyra’s Oxford and Will’s would lie over each other again, like transparent images on two sheets of