Old Man's War

I took a slight detour from the fantasy neighborhood into the world of military sf* with this story. At the age of 75, John Perry visits his wife's grave and then enlists in the Colonial Defense Forces. The CDF only takes recruits who have reached the age of 75 – they only want people with a lifetime of experiences to draw on. Then these recruits are whisked off Earth to one of the many CDF spaceships and given new genetically-enhanced bodies. Soon after that they are off killing aliens and protecting human colonists on other worlds. Moves quick enough and kept me interested, but not so interested that I'm rushing out to get the sequel. I think it's time for some non-fiction next.
* Those in the know refer to science fiction as “sf”, never “sci-fi.”