The Forever War

Humans fighting for centuries against an alien race in different theaters of war (mostly on far distant planets) are one of the main attractions of this book for me

Those soldiers on the front line travel at the speed of light to fight the enemy, they get older by a few days, while their relatives on earth do it by the years. And old but still cool idea.

The book reflects the very idea of going to war (in the real world) and coming home where everything is so unrecognizable (your family and friends are mostly gone) that you feel like an alien.

This is to me an interesting take on the scars of war. While I enjoyed Starship Troopers premise a bit more, this is a far more honest book.