**edited 11/28/13 
 When Mark Vorkosigan looks in a mirror, he doesn't quite know what stares back. Mark was created a clone, trained as an assassin, intended to replace his progenitor, Miles Vorkosigan, as part of an attack against the infamous Lord Vorkosigan of Barrayar. But Mark failed spectacularly in carrying out his task, partially because of the discovery that Miles himself has constructed an artificial identity as Admiral Miles Naismith of the Dendarii Free Mercenaries. Now Mark again plans to step out of the mirror to assume the identity of his clone brother, this time as his Naismith persona. For Mark to regain his sense of self, he wants to go back to his birthplace, the ruthless and ruleless Jackson's Whole, to rescue the other clones from their dismal fates. But Mark is merely a doppelganger; he lacks Miles' addiction to adrenaline and furious thinking in the face of adversity. When that desperate moment comes, can Mark carry out Miles' dance in his place? 
 Mirror Dance is one of my favourite books in the Vorkosigan Saga. Sure, it's a rip-roaring adventure involving at least three heists--I rather lost count--but it also touches upon the profound. 
 Due to my disapproval of GR's new and highly subjective review deletion policy, 
 the rest of my (rather verbose) review is posted on my blog.