Ask HN: Uncommon Reading Recommendations?

The other day I was going through the library stacks and came across "Incompleteness: The Proof and Paradox of Kurt Gödel" by Rebecca Goldstein and was really drawn into it, was a great read but it was something I never seen suggested anywhere. The book came out in 2005 and off the old due date slip, it was only ever checked out 7 times which made me think, what other good books have you read that fell beneath the radar? How did you find the book in the first place?