The book (without giving away too many spoilers): Commander Cordelia Naismith is working on an uninhabited planet for her Government's Survey Service. A sudden attack on her camp leads to a long trek through hostile territory; and eventually leads to captivity which - being a rather strong personality - she turns into something quite unexpected. Military strategy mixed with planetary politics mixed with romance, with strong personalities, weak politicians, and evil in various forms.
The author: Lois McMaster Bujold has written several series of books (including the Vorkosigan Saga, of which is the first part, and consisting of a series of full-length books as well as short stories) and several stand-alone novels. She has won the Hugo four times, as well as the Nebula twice, the Mythopoeic Award, the World Fantasy Award, and recently the Skylark Award.
My opinion: Bujold can write like a dream, and does so here. I am a sucker for her style, her imagination, and her personalities: vivid, fully three-dimensional, many things implied and not spelled out completely; humor, love, and a consistent Universe (well, kind of anyway). She writes with *feeling*, with soul; and manages to convey that so you feel a lot of the personalities' grief, fury, fear and joy. I love the whole of the Vorkosigan Saga, and this one is a brilliant start!