Mass Effect: Retribution

Mass Effect: Retribution is a science fiction novel by Canadian writer Drew Karpyshyn set in the Mass Effect universe. It is a sequel to the video game Mass Effect 2, as well as to its prequel novel, Mass Effect: Ascension, also written by Karpyshyn. Retribution is set directly after the events of Mass Effect 2, and like its predecessors, expands on the Mass Effect universe by fleshing out its setting and providing background on some key characters.