Ask HN: where do you find interesting books to read?

The two best books I read this year are

- Impro (1987), by Keith Johnstone, about the art of improvisation and Mask techniques, and how relations between people can help create a narrative and are fascinating to watch

- The Inner Game of Tennis (1997), by W. Timothy Gallwey, which doesn't talk much about tennis and a lot about how to "let go" in order to let your true self take control (playing tennis with the right side of the brain, if you will)

But for the life of me I can't remember where I first heard about those books (or others), and so I rely mostly on chance (and Amazon ratings, which are not always reliable).

What curated lists of books do you use, or mailing lists you're currently subscribed to?