Conquest: Book 1, the Chronicles of the Invaders, Connolly John, Ridyard Jennifer

Earth has been invaded by the Illyri--a beautiful, civilized, yet ruthless alien species. But humankind has not given up the fight, and Paul Kerr is one of a new generation of young Resistance leaders waging war on the invaders.

Syl Hellais is the first of the Illyri to be born on Earth. Trapped inside the walls of her fathers stronghold, hated by the humans, she longs to escape. But on her sixteenth birthday, her life will change forever. Syl becomes an outcast, an enemy of her people, for daring to save the life of one human: Paul Kerr. Only together do they have a chance of saving not only each other, but also the planet they both call home.