I enjoyed the article, but just wanted to say in case the author sees this: it's "whet" one's appetite. I don't know why. If it was me, I'd be thrilled if someone told me, so I'm taking that risk.
'Whet' means to sharpen (whetstones are used to sharpen knives, for example), so whetting one's appetite means to sharpen appetite, or to make one hungrier (for knowledge, food, whatever).
