I absolutely hate reading tech books, I feel like my soul is getting sucked thru my eyes, but it's shocking funny how much better you can reason about the world with just a couple of philosophy books.
Peter Singer, even though I'm not really a utilitarian, really helped my thinking skills at university. Formal logic and political philosophy were probably the two greatest units I ever took!
Any recommendations?
If you can't stand reading non-fiction, read "literature" quality fiction. High quality fiction conveys deep concepts through narrative. You can put yourself in the minds of others and experience different ways of reasoning, communicating, and being. For example, you could read "Homage to Catalonia" by Orwell (non-fiction experience during the Spanish civil war) or "Animal Farm" by Orwell (short fictional allegory) and come away with some of the same ideas the author has reached regarding power dynamics. One is lived experience, another is the distillate of the same, perhaps. Of course, reading both is best, but this is just an example. Personally, I find fiction a less efficient protocol, but there are many cases where it is more profound, more impactful, and more impressive a learning tool than non-fiction, particularly as concerns the more elusive and esoteric.
I like Locke, Hume, and Nietzsche. Stanford has a great "wiki" for their ideas so I would start there and then read further if you're interested.