Don't be quite so quick to rule out books that you now see as dark or political. One of my greatest joys now is going back and reading books like Ender's Game, Fahrenheit 451, or Starship Troopers and seeing how much my perception of them is changed. It's a great measure of your own maturation, and makes you realize that your opinions can and do change. Just as you said, you don't remember them being that dark because you didn't interpret them that way when you were younger.
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Don't be quite so quick to rule out books that you now see as dark or political. One of my greatest joys now is going back and reading books like Ender's Game, Fahrenheit 451, or Starship Troopers and seeing how much my perception of them is changed. It's a great measure of your own maturation, and makes you realize that your opinions can and do change. Just as you said, you don't remember them being that dark because you didn't interpret them that way when you were younger.