Number one seized the mug ravenously, and had just drunk enough to make him wish for more, when Mr Squeers gave the signal for number two, who gave up at the same interesting moment to number three; and the process was repeated until the milk and water terminated with number five.
There are no more uses of "ravenous" in the book.
Show samples from other sources
But Charlie Bucket never got what he wanted because the family couldn’t afford it, and as the cold weather went on and on, he became ravenously and desperately hungry.
Roald Dahl -- Charlie And The Chocolate Factory
But then the creature’s eyes are on me, bright and ravenous.