There is no such thing as an original book, as every single book you have ever read is just a remix of the dictionary. [SARCASM]
Over time books develop a distinct smell and this smell is referred to as bibliosmia.
A commonly overseen fact is that the bible is THE best selling book of all time with over 5 billion copies sold. Although this fact is quite logical given how large the Christian community is, many seem to unconsciously forget the fact that the bible is also considered as just a book.
Ever so often an author's made up words actually end up becoming a recognized part of the language. A rather interesting example would be how Dr. Seuss invented the word "nerd".
The word bookworm actually refers to any insect that might chew through a book. Now it is more commonly used to describe a person who likes books.