Borders of Infinity
Part of the Vorkosigan Saga by Lois McMaster Bujold...
I really liked the way this was presented. It's actually three short stories in the Vorkosigan series that had been published previously, but put together in one volume with a bit of narrative between them binding it all together. The stories are "Mountains of Mourning," "Labyrinth," and "Borders of Infinity." The last of course confuses things slightly since it's also the title of the collection.
The first one is kind of a detective story. There's been a death in the Vorkosigan District and Miles' father sends him out to figure out what happened and deal with it. It ends up being very personal for Miles since the death was an infanticide of a child that had a cleft lip/palete (and therefore considered a "mutant" under the old traditions). I think this one deals more with the attitudes of the older generations and the less educated people towards Miles than the rest of the books I've read so far. It's always mentioned, but it's much more overt in this one.
Second is the story of how Sergeant Taura came to be a part of the Dendarii. At first she's presented as a genetically-engineered killing machine, but after a bit it becomes clear that under the 8 foot tall monster with claws and fangs is a scared 16-year-old girl.
The last one thoroughly confused me until near the end. But in a good way. Miles is stuck in a POW camp and he of course tries to take control of the POWs. For most of it it seems like it's almost just to give him something to do and because he likes to be in control, but what was really going on does eventually become clear.
The narrative weaving between the three is Miles (in the hospital getting his arm bones replaced) reporting about the three incidents to Illyan.