The Forever War is a quick read that toys with themes of relativistic effects and first contact. It plays out about how one might expect, with the guy getting the girl and the aliens turning out not to be as bad as they first appeared. The author sort of wraps up the whole story in a quick little bow of “and then singularity, the end.” The whole story thus ends up being predictable and linear (despite the nonlinear time scales) but satisfying, with only the end feeling a bit slipshod. For something written in 1974, I can’t really complain. Worth it if you’re looking for a quick scifi read.