One that I have fond memories of is Oliver Rackham's The History of the Countryside, which is a thoroughly enjoyable and comprehensive view of why the British countryside is as we see it now.
On a very different note there is Gödel, Escher, Bach: an Eternal Golden Braid by Douglas Hofstadter. A classic and extraordinary dive into logic.
And then there is Eric Berne's Games People Play: The Psychology of Human Relationships, which introduced me (and thousands of others) to Transactional Analysis and certainly called some of my games out, as I expect it does with everyone.