While the campaign seems interesting, it's a difficult book to read, let alone to use at a game table, and it visibly needs editing. There is no overview of the campaign for the gamemaster. Many terms are introduced without a definition (ex page 20, "The leader of the Hercynians forces near Evergreen is a Primary"; neither "Hercynians" nor "Primary" have been defined yet); you have to check either the "bestiary" or the glossary at the end of the book. The most thorough physical description of an important alien species is only given in the middle of a scene, in readaloud text; it describes a dead member of this species (page 76) and no better description is given in their bestiary entry.
The presence of a rival team is a good idea, but isn't exploited enough: they are not mentioned between their arrival and the climax.
There is also a structural problem with Act 2: it consists of two different, parallel series of events happening simultaneously in two different places that are separated by enemy troops.
All of this feels too bad because otherwise, the game's themes seem to be respected, the ambiance looks great and the story is quite imaginative.