Peace and War: The Omnibus Edition (Forever War, Forever Free, Forever Peace)

Forever War: William Mandella is a reluctant hero, fighting in a distant interstellar war against unknowable and unconquerable aliens. But his greatest test will come when he returns to Earth. Relativity means that every time he returns home after a few months' your of duty, centuries have passed on Earth, making him and his fellows ever more isolated from the world for whose future they are fighting.

Forever Free: When Mandella returns home for the last time he finds humanity has evolved into a group mind called Man. Living a dull life in an autocratic and intrusive society, missing the certainties of combat and feeling increasingly alienated, the veterans plan an escape. But when their ship starts to fail, their journey becomes a search for the Unknown.

Forever Peace: 2043. The Ngumi war rages, fought by 'soldierboys', indestructible machines operated remotely by soldiers hundreds of miles away. Julian Class is one of these soldiers, and for him war is truly hell. But he and his companion, Dr. Amelia Harding, have discovered something that could literally take the universe back to square one. For Julian, the discovery isn't so much terrifying as tempting...