The Eternity Brigade by Stephen Goldin is one of the coolest books I've ever read. Its been years since I turned its pages (and childhood memories may enhance the writing style factor) but its theme resonates with me 30 years later. The book chronicles the tales of a soldier who finds it easier to cyrogenically frozen than go back home. He is woken up for war, trained in new tech and after its over frozen again. Eventually his dna is recorded and he is constructed for battle, complete with memories and experiences. Its a really cool book with a really memorable ending!