It's been quite a long while now since I read Orson Scott Card's Speaker for the Dead, but since I've still got a couple books left in this universe to read: here's a quick blurb.
Speaker for the Dead travels far into the future of Ender Wiggin's life. No longer the boy found in Ender's Game, Ender is a man who travels from one colony to another speaking on behalf of the dead. Ender's book "The Hive Queen and the Hegemon", which told the story of the buggers and their destruction, eventually became the basis of his profession: telling the story, both good and bad, of a life. Ender is called to a planet with a known intelligent alien life, piggies, to speak the death of Pipo, a xenologer who studies the piggies and has been brutally killed by them. En route to the planet, he is called again to speak the death of yet another murdered xenologer, Pipo's son Libo, and that of the husband, Marcos, of the planet's only xenobiologist, Novinha, who had worked closely with both Pipo and Libo. Ender arrives to find Novinha an embittered and detached adult who is terrified of the secrets Ender might reveal in speaking the deaths of the three men. Naturally, Ender shakes things up for the entire community, first by showing up at all and then by revealing so much that has been kept secret.