Robert Anson Heinlein. Stranger in a Strange Land was great, as was The Moon is a Harsh Mistress.
"An armed society is a polite society. Manners are good when one may have to back up his acts with his life." - Beyond This Horizon
"I also think there are prices too high to pay to save the United States. Conscription is one of them. Conscription is slavery, and I don't think that any people or nation has a right to save itself at the price of slavery for anyone, no matter what name it is called. We have had the draft for twenty years now; I think this is shameful.
If a country can't save itself through the volunteer service of its own free people, then I say : Let the damned thing go down the drain!"
Ahem. Fuck Roosevelt! :)
Occasionally I read sci-fi, or what passes for close to it. I recently read 'The Stars My Destination' by Alfred Bester, whom some consider a god-father to the genre. It was originally released as 'Tiger, Tiger'. Also enjoy the classics, like Asimov, but also like Richard Matheson and some of Vonnegut's science-fictiony (?)
I've got Amazon on hold while I look at other's suggestions.