Twenty years after the discovery of artificial wormholes launches Earth space exploration to unforeseeable heights, Starplex Director Keith Lansing investigates a mysterious vessel that soon threatens the station with intergalactic war.
The book's weaknesses include
1. a weak protagonist
2. too many "Star Trek"-like devices (tractor beams, force fields)
3. uneven treatment of the human-Walhal (the pig creatures) dynamics.
Unlike many of the (harsh) negative critics below, I found the book quite enjoyable, even if there is some hand-waving here and there. It's not like that hasn't been done before in SF. And just to set the matter straight, Sawyer does NOT imply that laser beams are visible (he clearly states that the computer animated the laser fire in a holographic display) and he does not say that a spaceship swerves to avoid direct laser fire; what he does say is that a spaceship maneuvers to avoid another, spinning spaceship which happens to be firing a laser.
The book is enjoyable science fiction. The key word in this phrase is fiction.
To begin, Sawyer is an excellent writer. Plotting, dialogue, and human drama aspects are all well-represented here. He also never loses sight of using humor, awe (in its truest sense), human limitations, and philosophical twists to create realities that are at once far, far away, yet understandable.
I'm sure Robert J. Sawyer has his critics - every writer does. Bottom line here, though, is that Sawyer has created his own voice with which to tell great stories (science fiction and otherwise), and Starplex is one of his best.