The Wasatti Empire - Tales of the Antares Rangers, #4

Book Four of the award-winning Tales of the Antares Rangers Series... Peter Campbell and his crew of four schoolmates escaped from a losing battle against the Wasatti 680 years ago. In that time, they've traveled over 1, 050 light-years in the living starship, the Sampson K. Perry. They repaired the dying ship while in the tight embrace of the supergiant star, Antares; they found new friends in the heir of the D'war'en people and the controlling Al'Va race; they lost one of their own and in so doing they found new enemies in the Sargassian race; and they uncovered an inconceivably powerful weapon that could help them in their losing war--a weapon they don't even understand yet how to use--called the Orb of Jabbah.
Learning that their war has already been lost, they take the Orb to the very heart of the Wasatti itself in a last-ditch attempt to destroy the Wasatti Empire in one massive blow. They find another willing ally living in the Wasatti star cluster, but can they really be trusted? And what will Peter and his crew be willing to sacrifice to see their mission succeed?