In no particular order,
I've been reading one page a day from the Tao Te Ching recently until I finish it, started before I went to visit my Dad, but without internet access, I found it a harder read, so I stopped for a while.
I think it says a lot worth thinking on, which is part of the problem, often I need to look online to get other translations of contexts for words or culture.
Bit like a puzzle box, I've also enjoyed having someone online that I talk to it about, makes it easier, like a workout buddy.
The Bible, I haven't read it recently, but my mind pops to it now and then, from earlier readings. Some of its ways of looking at the world, and some of it's values. Also faith of one's ancestors (For a time) and all that.
Man's search for meaning by Viktor Frankl. I think has interesting views on humans and purpose that they live by and create.
I had a copy of Marcus Aurelius that I 'really liked but lost, still need to replace it. Couple other copies I've tried don't work for me.
But I liked it, advice giving, perspective on existence, though I don't agree with 'all of it. Too much Ego.
I've a copy of Mencius, that I've enjoyed reading a couple times. Much of the book being dialogue makes for easy reading. I enjoy a number of the perspectives and arguments. Ox Mountain for example has stuck in my head.
I've a copy of Confucious, I like much of it. Enjoy his use of the word gentleman, and encouragement of introspection.
Mission at Nuremberg by Tim Townsend. Lot of it is about the chaplain, bunch much does talk of Nuremberg defendants.
The Nuremberg Interviews by Leon Goldensohn and Nuremberg Diary by G.M. Gilbert.
I prefer Goldensohn, listens and take notes more than Gilbert. Gilbert seemed less objective and more judgy and patronizing in his views.
The Lucifer Effect by Phillip Zimbardo.
Arguably a flawed experiment, but still instructive, he also touches on subjects such as Abu Ghraib and human systems effects on people.
The Psychology of Dictatorship by Fathali M. Moghaddam.
Talked a lot about Iran, how some dictatorships can be formed, maintained, effects.
Discourses on Livy and the Prince, both by Niccolo Machiavelli.
Lot of interesting arguments on societies, governments, nations, people, politics, game theory.
Plato The Republic. Been a while since I read it, not sure I agreed with all of it, but I did find it engaging, got me to think.
The Book of Lord Shang. Had a lot of values dissonance for me in places, as well as arguments I disagreed with. Bit archaic read, but I found it worth reading and reflecting on. Agreed with some of it.
No Treason by Lysander Spooner. Had some interesting thoughts on Government and Freedom of individuals.
The Law by Frederic Bastiat. Lot of arguments against the State.
There are other books, but all of the above are on my personal re-reading list.