What topic area?
These are the ones I would recommend for philosophy:
Aristotle - Nichomachean Ethics
Lao Tzu - The Tao te Ching
Leonard Peikoff - Objectivism: The Philosophy of Ayn Rand
Marshall Rosenberg - Nonviolent Communication
Richard Dawkins - The Selfish Gene
Any I like a good fiction story, some science fiction, anything historical or classic, or non fiction if it is not too boring.
Heinlein's 'The Moon is a Harsh Mistress' is good
I enjoyed Andre Norton's 'Star Guard' which is military sci-fi (mostly on foot)
Any other Heinlein you recommend I have read the Moon is a Harsh Mistress enjoyed it
I've heard good things about Starship Troopers but haven't read it
(and apparently the film is not the most faithful adaptation)
I have read Stranger in a Strange Land, which was worthwhile... it has more of a 'flower child' or 'new age spirituality' tone than 'Moon' but I think it's an interesting story nonetheless
Thanks!
