I am trying to find words to describe two distinct entities related to books, but I guess I am struggling because English is not my native language.
What do you call the concrete entity of a book, e.g., a book that I have in my hands vs. the conceptual entity of a book, e.g., the one that a publisher has in their catalog?
For example, in Portuguese we could call the conceptual book a "livro" and the physical entity an "exemplar" of this "livro".
I think I could call them "Book" and "Book copy" but it is not very satisfying, are there better words to describe those two entities?