bibliomancy n.

word-forming element meaning "book" or sometimes "Bible," from Greek biblion "paper, scroll," also the ordinary word for "a book as a division of a larger work;" originally a diminutive of byblos "Egyptian papyrus." This is perhaps from Byblos, the Phoenician port from which Egyptian papyrus was exported to Greece (modern Jebeil, in Lebanon; for sense evolution compare parchment). Or the place name might be from the Greek word, which then would be probably of Egyptian origin. Compare Bible. Latin liber (see library) and English book also are ultimately from plant-words.

word-forming element of Greek origin meaning "divination by means of," from Old French -mancie, from Late Latin -mantia, from Greek manteia "oracle, divination," from mantis "one who divines, a seer, prophet; one touched by divine madness," from mainesthai "be inspired," which is related to menos "passion, spirit" (from PIE *mnyo-, suffixed form of root *men- (1) "to think," with derivatives referring to qualities and states of mind or thought). Compare mania.

"divination by means of verses," by 1738, from French rhapsodomancie, from Greek rhapsodos "a rhapsodist" (see rhapsody) + -manteia (see -mancy). Also compare sortes under bibliomancy.

There were various methods of practicing rhapsodomancy—Sometimes they wrote several verses or sentences of a poet, on so many pieces of wood, paper, or the like; shook them together in an urn; and drew out one, which was accounted the lot. Sometimes they cast dice on a table, whereon verses were wrote; and that whereon the dye lodged, contained the prediction. [Chambers' "Cyclopædia," London, 1738]