Sol Thu'ma is a new "galaxy" (sphere) for Spherechild with a sience fiction/horror setting. But this book not only contains this setting it also have new races, proffesion, weapons, equipment, creatures and rules for space combat. The book also contains an adventure for the new worlds and the world from the core rules: Valcreon it contains a full color map (A2) for the space system round Sol Thu'ma (user summary)