Two complete novels in the New York Times best-selling series in one large volume. Crusade: Neither side could defeat the other, so the Human - Orion war fizzled into an uneasy peace. Then a ship appeared from the dim mists of half - forgotten history, and fired on the Orion sentry ship, igniting the fires of interstellar war anew, in a quest to free Holy Mother Terra. In Death Ground: The human race and two other star traveling races had warred with each other in the past, but now all three are at peace - a peace which is shattered by the discovery of a fourth race, the Bugs, who regard all other species as fit only to be food animals. There is no hope for peace with the invaders, and the galaxy explodes in a battle to the death. Kill - or be eaten!