a BOOK is a sequential collection of pages, loose leaf or bound.
It is circulating as a PUBLICATION.
a BOOK OBJECT looks like a BOOK but it is not.
a BOOK OBJECT has a sequential collection of pages, loose leaf or bound, but it is not circulating.
it is a unique piece or limited to a few copies.
CAKE a cake can look like a BOOK or like a BOOK OBJECT, but it is not.
it is not circulating and is a unique piece or limited to a few copies
it is not readable either. it doesn´t have functioning pages.
another term for the same thing would be SCULPTURE with the look of a book
however, a BOOK OBJECT and even a BOOK can be a sculpture, too.
an E-BOOK is a digital file that mimicks a BOOK, though it is not. Like an ugly duckling, whose real potential is yet to be discovered.
it is a PUBLICATION and is circulating.
Pichler, Michalis, "BOOK_BOOK_OBJECT_CAKE_E_BOOK_ETC," in What is a Book?: 101 Responses, ed. Borsuk (Victoria, TX: American Book Review, 2020), 4-26.