In one of Robert Heinlein's most controversial bestsellers, a recruit of the future goes through the toughest boot camp in the Universe--and into battle with the Terran Mobile Infantry against mankind's most frightening enemy.
Quick, fluffy. Heinlein does like a good soapbox, though. I kept blurring Ender's Game with this, though. Too many bugs.
This site is a test bed for aggregation. It pulls from quite a few places: