I bought this book because it got a large number of positive reviews. Perhaps I started with my expectations too high, but I struggled with this story. The good news is, the writing is both clear and clean. I generally knew what was happening, and I spotted a below-average number of typos. The story itself isn't bad.
I'll start with the science, because it's objective and easier to explain why it bothered me. Most of the time I have no trouble suspending my disbelief for a sci-fi story, even when the science isn't quite right. If a spaceship travels at Ludicrous Speed or a main character sends blueprints of a time machine back in time to herself, it doesn't detract from my enjoyment of the story. If a story is getting high school level physics wrong, it becomes irksome. Maybe it's fine if a spy novel ignores Newtonian physics, but in a sci-fi story, the “sci” is at least mildly significant.
The following quote got the science so wrong that I had to put down the book and go outside for some fresh air for a while before resuming the story:
“Turner pulled back the throttle on their modified cargo jet, and for the first time in several hours, the G-forces pushing against them eased.”
So they've been at a constant acceleration (as opposed to a constant velocity) for several hours? And not just a constant acceleration, but an acceleration at which they feel noticeable G-forces. So let's say it's a G-force of 2, and they've been accelerating for 2 hours, just to be conservative. Their “modified cargo jet” is now traveling at 315,891 miles per hour. Impressive! Except that in the next line it says they'll be on site in four minutes, and we've already been told they're exactly 5 kilometers away, so something is off.
One more science quote, and then I'll stop dwelling on it. This one is two characters discussing satellite surveillance:
”...but we can't see where she is until the Earth rotates again.”
“I told you our satellite needed to be maneuverable,” Thann said.
That's not...... that's not how satellites work.
The story also contains some frustrating continuity issues. One example is that we're told from various sources that no aliens have visited Earth since 3,000 years ago, when an alien corporation broke galactic law. If there had been any alien visitors since, they would have discovered the law violation, and there would be big consequences. In fact, that galactic corporation is making efforts to ensure no one visits Earth and finds out about their illegal activities here 3,000 years ago. At one point Koritt promises the humans that if they let him go, he'll file a report with the corporation saying there's no intelligent life on Earth, and then the humans will be left alone. HOWEVER, the main villains in the story belong to a secret government agency set up several decades ago that studies and reverse engineers alien tech that they recover from the aliens who sometimes crash on Earth.
Does every single UFO that comes close enough to Earth to detect life immediately crash with no survivors and no way to report back and no distress beacons for a search and rescue party? What are the odds? It's either the worst luck imaginable on the part of the aliens, or a major continuity issue.
Finally, the thing that probably bothered me the most, and made it difficult for me to get lost in the story and ignore the nit-picky issues like science and continuity, is the tired racist stereotypes. Sometimes it's subtle; sometimes it's not so subtle.
The Americans are all flawless geniuses. They're untouchable in a firefight, they're at all times three steps ahead of every opponent they face, human or alien, and they correctly interpret how to use every piece of alien tech on the first try with zero hesitation. The Afghan locals, on the other hand, are all bumbling idiots who are obsessed with beheading everyone and anyone they come in contact with. Friend or foe, if it has a head, every Afghan citizen in this story wants to chop it off. But it's ok, you see, because they also get killed literally hundreds at a time, while the small group of Americans come away unscathed without breaking a sweat (and often using a healthy dose of deus ex machina).
The distinctly racist gun used near the beginning of the story didn't help this for me either. Even in the narration, there's a clear difference in attitude towards the sacredness of human lives depending on the nationality of the character.
The concept was fun, the writing isn't bad, and the story had so much potential, but it just wasn't the book for me.