You must know, then, that the above-named gentleman whenever he was at leisure (which was mostly all the year round) gave himself up to reading books of chivalry with such ardour and avidity that he almost entirely neglected the pursuit of his field-sports, and even the management of his property; and to such a pitch did his eagerness and infatuation go that he sold many an acre of tillageland to buy books of chivalry to read, and brought home as many of them as he could get.
There are no more uses of "avidity" in the book.
Show samples from other sources
Hubert Bazin with his copper mask and boyish avidity and his breath like crushed insects.
Anthony Doerr -- All the Light We Cannot See
But the cursory glance my father had taken of my volume by no means assured me that he was acquainted with its contents, and I continued to read with the greatest avidity.