[mtmail]

> I'm about to hop on a 13 hour flight

If you need answers fast, the HN search feature lists hundreds of answers for "ask hn favorite book', 'ask hn best book' on multiple topics, fiction and non-fiction.

I quite liked the 'Ask HN: What books changed the way you think about almost everything?' https://news.ycombinator.com/item?id=19087418

Personally I added the audio book 'Salt: A World History' for my next long flight.