From the back of the book:The Jovian Chronicles is a new universe sourcebook for the acclaimed Mekton II role-playing game. Greatly inspired by Japanese science-fiction animation, it is the first in a line of modules and sourcebooks that will take you beyond the confines of planet Earth to discover a solar system on the brink of war. Along the way, the players will interact with a rich cast of characters and possibly alter forever the destiny of the Jovian Confederation, if not the human race! - BoardGameGeek