The Last Starship — Michael Carroll

It is the year 2365. On the distant planet of Pelicos, the only colony of the human race has learned of a devastating war on Earth. Now the small colony must learn to survive without Earth's help. The imminent arrival of the starship Constantine gives the colonists hope, but the starship's captain hides a secret that could destroy them all. Young Conner Hassan, whose father has been jailed for attempted murder on Pelicos, tries to come to terms with the changes the future will bring, but first he must discover the secret of the Constantine.