Excellent question, new hope and happiness !
Here are some:
- The Name of the Rose, by Umberto Eco
- The Blind Watchmaker, by Richard Dawkins
- a history of Marxism, in my native tongue (lots of books on this, in many languages)
- Guns, Germs and Steel, by Jared Diamond
- The Origin of Species, by Charles Darwin
- some books by Fernando Pessoa (you'll know why when you read him)
I strongly recommend all of them; if anything, they enable you to see how nature and the world truly operate. They are awakening experiences, in other words.