Raiders. The Secret War, #1

What happens when you're worth more dead than alive?Lim Willet was a decorated fighter pilot, and his death inspired thousands of recruits to join the war against the Mayestrans. Sam Willet is one of those recruits. She's also his sister, and she's noticed that something doesn't add up. When Sam starts asking questions, she discovers someone has gone to extraordinary lengths to bury the truth. Soon she's caught up in a desperate mission behind enemy lines, with a stolen spacecraft, a damaged robot and a whole lot of Mayestrans trying to kill her.
Finding out what happened to her brother was never going to be easy. Surviving long enough to tell the truth might be impossible. Raiders is a fast-paced military science-fiction adventure and the first novel in the Secret War series.