All books created today exist electronically before (a copy) gets physically printed of a book that remains existing.
Not really. There is a lot of full manuscrit books made to this day. By scholar in region where electricity is not as much available. By student compile hand-written notes from oral teaching. By people composing small things for family and friends or just for themselves. By activist and locally involed people making just on or a few copy to be share in physicial Space around them.
That's a huge part of what exist outside the publishing industry.
Many should probably be distroy without training a LLM or we will get models that are aggressivly mysoginist and who verbally abuse female users, on top of every other problem they cause.