I’m not even 30 yet so I’m sure this list will change, but here are my favorite sci-fi stories so far:
5. Post-Human series by David Simpson
The desire to become stronger, faster, smarter…to push the limits of the human body and redefine what it means to be Homo sapiens sapiens, is probably captured best in this series than any other.
4. Simulacron-3 by Daniel F. Galouye
The world was taken by storm when the Matrix made the simulation argument popular, but Galouye takes the idea a step further. Even if our consciousness wasn’t real, but virtual, would it still have value? If those outside the machine deleted a virtual consciousness, is that murder?
3. Nightfall by Isaac Asimov
Wow! This story had an ending that I didn’t expect. The fragility of the human mind when dealing with cognitive dissonance, when overwhelmed by new information, can be a terrifying concept to accept.
2. The Dark Forest by Cixin Liu
The second installment of the “Remembrance of Earth’s Past” trilogy poses a solution to Fermi’s paradox of “Why have we not encountered other sapient life forms?” that will make you wish we never encounter them. Or that we’re the more advanced of the two when we do.
1. Ender’s Game by Orson Scott Carson
The Enderverse series is the only one that I’ve gone to great lengths to keep up with. Yes, I have every single book and I plan on keeping it that way. Card brilliantly displays the problem with anthropocentrism and human aggression. Sometimes shooting first and asking questions later can be morally disastrous even when it comes to our own survival.
Sc1Fly the Critic 
I LOVED the Enders Game! I couldn’t put it down! I don’t plan on reading the others because (SPOILER ALERT) I’d like to pretend that Ender went to the new planet and lived ‘Happily Ever After’, even though I know that that isn’t true.. Great list!
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