The Master and His Emissary by Ian McGilchrist

Why Materialism is Baloney by Bernardo Kastrup

The first one really opened my mind to alternate modes of thought. The first half of the book is especially interesting, the second half is skippable. I don't think I could have appreciated the second book if I hadn't read the first.

The Dictator's Handbook by Bueno de Mesquita and Smith is another good one. Afaik, the first successful attempt to create a true theory of politics.