Galahad 1: The Comet's Curse

In this Young Adult novel, deadly particles in a comet's tail have altered the Earth's atmosphere. The only hope for saving mankind is to select the brightest young people from around the world and launch them towards a new home, light-years away. But trouble has also boarded Galahad, and it could easily spell disaster. The ship's Council, with help from the most incredible computer ever created, must battle fear, jealousy, and time...before it's too late.