The Forever War
Published: 1968
The Earth's leaders have drawn a line in the interstellar sand--despite the fact that the fierce alien enemy they would oppose is inscrutable, unconquerable, and very far away. A reluctant conscript drafted into an elite Military unit, Private William Mandella has been propelled through space and time to fight in the distant thousand-year conflict; to perform his duties and do whatever it takes to survive the ordeal and return home. But "home" may be even…

This novel has it all. You care for Mandella. The battles are as gripping whether they take place on some outpost planet or in deep space. The finale is as satisfactory as one would want it, considering our journey through space and time.

Private Haldeman