The best in the series, but still with flaws.
I finally made some sense of the universe in which the series took place. There was enough detail to understand that the reason the universe is so small is because interstellar space travel relies on "jump points", which have specific locations. So my previous complaint about so much traffic in space maybe wasn't fair (in a previous book), as if there are only a few jump points, then necessarily all traffic would come by in due course.
But there was a lot more this book failed on. I really hated the revisionist alteration of the jump point physics to move the plot along. "Hey, we're in trouble... any ideas? Maybe we can try that theoretical idea about using the jump points differently - what do you think?" Lame when it happens once, excruciating when it happens twice.
Also, once again I am complaining about "friction" in space. It's not so evident as in previous books, but they keep mentioning "we won't have enough fuel to return". Unless travelling in jumpspace is frictional, there should be no limit to how far you can travel in space with even a tiny amount of fuel. The complaint should be "we won't have enough fuel to return in time"... but this novel did it better than previous ones did, so that's a bit nitpicking.
Finally, one more glaring flaw. It's very jarring for the reader when the crucial action happens offstage. I hated it in previous books, and it happens once again here. The ship comes out of a jump point (pursued by enemy aliens so they can't retreat) only to find themselves in a trap. A complete armada, arranged in spherical positions, surrounding the jump point. What can they do? They begin to discuss a desperate plan, admitting that they could be destroyed at any second.
And then the action takes place offstage. The next thing you read is the alien commander who is livid that the humans escaped. What? How? No nail-biting suspense at how they barely made it? No description of the flight? Really, really jarring for the reader.
Also, a complaint for the author making the bad guys not only bad, but outright insane. In fact, the bad guys are so evil that when they encounter aliens, the aliens realize immediately that the heroes are basically good, and also that the humans' enemies are completely and utterly insane. The aliens only concern is the way the humans expand so quickly, but they quickly and easily ally with the humans. It would be nice to have a little more difficulty in determining that the actions of the protagonists is capable of being judged in different ways. Too black-and-white.
It was interesting to read the various Canadian references, and even one Star Trek reference. But all in all, this was just a so-so SF novel, barely second-rate at best. And it's the best of the series.
2.5 stars.