The anticipated final chapter of the award-winning Horizon series is here! After a brutal civil war, Almagest is finally at peace, but the larger battle isn't over. Dr. Caeli Crys has been captured by the Drokarans, feared enemy of the Interplanetary Alliance, who plan to use her unique telepathic gifts for their own sinister purposes. Captain Derek Markham and his elite team of operatives race after Caeli, but soon find themselves trapped behind enemy lines on an occupied world. Despite the mounting danger, Derek will stop at nothing to save the woman he loves. As events spiral toward a conflict that will define the fate of the Alliance, the team will be pushed to the limits of their strength-and discover that the greatest threat of all may come from an enemy within.