Brady Garrett needs to go home. He's a conscripted recruit on Defender Three, one of a network of stations designed to protect the Earth from alien attack. He's also angry, homesick, and afraid. If he doesn't get home he'll lose his family, but there's no way back except in a body bag. Cameron Rushton needs a heartbeat. Four years ago Cam was taken by the Faceless--the alien race that almost destroyed Earth. Now he's back, and when the doctors...