If you liked Dune, Atlantis Gene, Foundation, Ender's Game, and Starship Troopers, you'll love Battlefield Earth.

Sadistic Aliens...

...Man is an endangered species.
Is it the end of the world or the rebirth of a new one?
In the year A.D. 3000, Earth is a dystopian wasteland. The great cities stand crumbling as a brutal reminder of what we once were. When the Psychlos invaded, all the world’s armies mustered little resistance against the advanced alien weapons.
Now, the man animals serve one purpose. Do the Psychlos’ bidding or face extinction.
One man, Jonnie Goodboy Tyler, has a plan. They must learn about the Psychlos and their weapons. He needs the other humans to follow him. And that may not be enough.
Can he outwit his Psychlo captor, Terl?
The fate of the Galaxy lies on the Battlefield of Earth.