bibliophage
A person who loves to read books; a bookworm.
figuratively
Janet loved reading. She was a real bibliophage.
A creature that consumes books’ physical contents.
Once inside, they begin to mine; there may be apparently nothing wrong outside, but when you open the book you find a hollow filled with insects, which have eaten almost all the letterpress, up to the margins. By keeping the shelves away from the walls and giving a little attention to wormy volumes, the Library may be easily freed from this kind of Bibliophage.
Where it comes from
From biblio- + -phage, from Ancient Greek βῐ́βλος (bĭ́blos, “book”) and φαγεῖν (phageîn, “to eat”).
Adapted from the Wiktionary entry bibliophage (CC BY-SA 4.0).