From the back of the book:
"Spinward of the Imperium, a race of ferocious carnivores has evolved to intelligence and rules hundreds of star systems. They are the Aslan, interstellar neighbors of the Imperium. This warrior race has long been a mystery to the ordinary human, and now it is possible to learn more about their culture and society.
Alien Module 1: Aslan describes in detail this alien race, its homeworld, and its starfaring society. This module includes:
Aslan History and Culture: Detailed essays on the Aslan, their culture, their behaviour and their society.
Asland Character Generation: New careers specifically designed for the Aslan race, such as Spacer, Wanderer, Outcast, Outlaw or Envoy. New specialties allow your character to be an Assassin, Epic Poet, Duellist or Shipmaster!
World Generation: Tables and rules for Aslan worlds, governments, bases, law and tech levels.
Aslan Encounters: Patrons and random encounter lists for ventures into Aslan territory.
Weapons, Vehicles and Equipment for the Aslan race.
The Trojan Reach: This war-torn sector is described in full detail. Divided between the Imperium, the Aslan Hierate and dozens of neutral worlds, this wild region of space is the new borderland between the two great powers."