Oh God, no! Don't force me to decide!
In no particular order of preference:
Atlas Shrugged - Ayn Rand
The Probability Broach - L Neil Smith
Conflict of Honors - Sharon Lee and Steve Miller
Red Thunder - John Varley
Mutineer's Moon trilogy - David Weber
Honor Harrington series - David Weber
If I were stuck on a desert islan with these books, I'd survive!
Derek