Since nobody else has mentioned it, let me offer this choice bit of old-school Sci-Fi.
Like many other works, you’ll have to suspend belief, but if you can get past the jaunting in the first chapter, you’ll have a theroly enjoyable time. It’s basically a retelling of the Count of Monte Cristo with ray-guns and space ships. It’s funny, exciting, and has a genuine point to make. It’s very short, and will only take a few hours to read - but it is time you’ll enjoy and remember.
Here’s the wikipedia thing on it…
http://en.wikipedia.org/wiki/The_Stars_My_Destination
— Dismal jaunts away (poof)