If you haven’t read Lois Bujold’s masterful Miles Vorkosigan series, do yourself a favor and get the first in the series, Cordelia’s Honor (this is a compendium of two novels: Shards of Honor and Barrayar) and then move on to Young Miles which is a combination of the book The Warrior’s Apprentice, the novelette The Mountains of Mourning and the novel The Vor Game. Once there, you’ll doubtless go through the whole series which will lead you to the latest, Cryoburn.
Lois has won more Hugos and Nebulas than anyone — and deservedly so! Mum loves her so much that she’s quoted on the covers with the very accurate, “Boy, can she write!”
As for Cryoburn, I was very glad to read more of Miles and very saddened by the ending but Lois Bujold handled it all masterfully.