“Defy the Stars” by Claudia Gray was the best YA Sci-Fi book I’ve read yet. It follows Abel, an Earth android with human intelligence stranded on a ship for 30 years during a war between Earth and a super-earth, Genesis. Noemi, a Genesis soldier, finds Abel’s ship. As the only human commander on the ship, Abel must follow Noemi’s orders and she commands him to help her destroy the wormhole linking Earth and Genesis. They take off for an adventure through the galaxy visiting various moons and planets, finding allies and enemies along the way. Highly recommended!