Douglas Harper's Etymology Dictionary
biblio-
word-forming element meaning "book" or sometimes "Bible," from Greek biblio-, comb. form of biblion "book" (see Bible).
Wiktionary
biblio-
pre. relating to books
Usage examples of "biblio-".
Centuria Librorum Absconditorum: being Notes Bio- Biblio- Icono graphical and Critical, on Curious and Uncommon Books (London, 1879).