Mediations
By Marcus Aurelius, It's a stoic philosophical book, which will be helpful for any kind of person.
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Behave
By Robert Sapolsky, One of the fascinating book about Human Brain and our behavior at best and worst.
The Beginning of Infinity
By one of the great Physicist of our time, David Deutsch, One of the best book of our time. It'll help develop different perception on reality.
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The Future of Humanity
By Michio Kaku. It's great book which will develop optimistic view on human scientific progress.
The Skeptic's Guide to the Universe
One of the best book for development of perception and understanding reality.