Definition someone who loves (and usually collects) books
Her library is the envy of every bibliophile.
I'm looking for a first edition for a bibliophile.
I'm afraid I've degenerated into a bibliophile.
Christopher Paolini -- Eragon
An uncle had left him a collection already noted among bibliophiles; the existence of the collection was the only fact that had ever shed glory on the name of Gryce, and the nephew took as much pride in his inheritance as though it had been his own work.