A fun read is Benjamin Wallace's The Billionaire's Vinegar. Ostensibly it's about the then-most expensive bottle of wine sold, a bottle supposedly owned by Benjamin Franklin, but it's a good tour through expensive wines and old wines. It's from 2008 so I imagine most of the superlatives are outdated and some of the detecting tech might be improved, but a fine enough read.

Some good lines, perhaps most relevantly: "A truism about mature wines is that there are no great wines, only great bottles."