Tanya Huff
Book 3 in the Valor sequence
Torin Kerr is now one of the most famous marines around. Having singlehandedly brought the Silsviss into the Confederation, and escaped an organic plastic alien being, everybody has heard about her. She has also been promoted to Gunnery Sergeant, and is immediately tasked with a personal security posting. An old friend asked for her to accompany him as he joins a class of cadets through their final training tests. He is going solely as an observer to test out some new organic plastic prosthetics that have been used in an arm he just regrew. (See the foreshadowing - organic plastic prosthetic). Again, all new characters, and again, everything goes wrong. It is up to Kerr to impose her Gunnery Sergeant will upon the universe to keep her people alive.
4 stars (out of 4)