23 is a sci-fi/fantasy novel about a post-apocalyptic world where aliens and humans live in ever-rising tension. Shauna Sloane who has been on the run for twenty years. She's survived an alien Invasion. An extraterrestrial war. And eight years of martial law set by the one and only ruling entity for humans on Earth: the World Militia. The extraterrestrial life that are still on Earth have divided - some on their own and some bide...