Following directly upon the events of 'Memory,' 'Komarr' still functions as a stand-alone novel.
And... I liked it even better than 'Memory.' The plot felt more original, and it just has a really well-structured, exciting story, backed up by well-rounded, believable characters and a vivid, consistent setting.
Miles Vorkosigan is sent, in his role as Imperial Auditor to the still-somewhat-rebellious subject planet of Komarr to investigate a space accident (or, possibly, act of sabotage) that may seriously impact Komarr's terraforming project.
He accepts the hospitality of his colleague's niece, whose husband happens to be an administrator in that terraforming project. Unfortunately, the husband's also a shiftless jerk, and his and Ekaterin's marriage is on the verge of falling apart.
As layers of plots and motivations unravel, you'll find yourself staying up late to finish... well, at least I did!