Bibliophilia A devotion to books and book collecting. Sir Thomas Phillipps (1792–1872) is an especially notable example of a bibliophile whose manuscript collection surpassed all other private hoards. His obsession bordered on bibliomania, and kept him constantly on the edge of bankruptcy.

Bibliomania A love of books, sometimes pursued to the point of unreason or madness. One Don Vicente, a Spanish scholar, is reputed to have committed murder to obtain a supposedly unique book. – Brewer's Dictionary of Phrase & Fable