bibliophagy

:  the act or habit of reading voraciously So Toynbee gave up his omnivorous bibliophagy and adopted a new literary diet: He would take up only the works he needed to know in order to write his own books. — Michael Dirda, Washington Post, 14 May 2000 A busy autodidact, he failed to establish an educational program for his son apart from the schoolroom, effectively leaving Tom to indulge his bibliophagy. — Robert E. Sullivan, Macaulay: The Tragedy of Power, 2009