What is the Forever War about?

The Forever War was written by Joe Haldeman and published in 1974. It follows the story of the main protagonist, William Mandella, as he is conscripted to fight in an interstellar war against the Taurans. The book was awarded the Nebula Award in 1975 and the Hugo and Locus awards in 1976. 

The Forever War deals with themes of a soldier's experience with war and represents the author's experience in the Vietnam War. The sequels, Forever Peace (1997) and Forever Free (1999), followed and are direct sequels to the original novel.