Your copy of "The Fountainhead" is unique. It has had experiences that have altered it so it is no longer an exact copy of the original so when you destroy the book you are losing all that information, printing out a new copy of the book does not recreate your old book. A book is more than just the story that it contains.
I totally agree that we are not just our brain, indeed on its own the brain is pretty crap at being me, but the "I" that I am is the product of all the changes that have happened to the meatbag that we call "I". I would go further and say that there is no black and white, no clear cut line to where I end and the "rest of the environment" starts, I am contiguous with the environment; to such an extent that the particles in the air that I use to precess the smell of toast cooking in my kitchen right at this moment links me directly to the toast, the toast in a real and meaningful manner is part of what we generally call "I".
So to duplicate me "truly" accurately you'd have to duplicate my environment and that isn't very practical. Now in practical terms is there a lesser fidelity by which you could create a new "I" either from a destructive scanning of this particular meatbag or one that creates a new meatbag and doesn't destroy the original meatbag that would for all extent and purposes be indistinguishable from "I"? My guess is that yes there is.