It was a struggle
I listened to the audiobook version of this book with RC Bray as the narrator and, as usual, RC did a fantastic job. Frankly, he was the reason I selected the book and hung in there until the end.
The book's summary sums up the entire plot of the book leaving only the reason for the invasion and its outcome to be discovered, so I don't need to elaborate on the plot.
The book is presented from the perspective of only a few characters. For each, we are provided an excerpt from a journal each of them seems to be keeping, and then from the journal entry, the book then goes into the actual event that was just described in the journal. This was repetitious.
In addition to the journal entry and depiction of the battle scene is the internal monolog each character goes through. These monologs go on and on about the circumstance in which the character finds himself and the thought process he goes through. Ordinarily, this would be an effective tool, but in this book, it is repetitious and annoying. For the most part, each is a reiteration of "the oppressors must be challenged, people will die but we have no choice and I will fight until my last breath". Rinse and repeat.
There are numerous holes in the plot. Realize that 90% of humanity is wiped out on the first day of the invasion. Any resistance put up from the armies is totally ineffective. All cities are destroyed using nuclear weapons. But our protagonists had the foresight to hide in the subway and managed to survive. Despite worries, there is no negative impact of radiation. The food they manage to find seems fine.
There are no real details around the armament that the survivors use against the aliens. But it appears to be limited to small-arms. Amazingly, they find huge weapon caches amongst the ruins and are able to equip thousands of people with guns to fight. The enemy literally dies of a thousand cuts as they are pummeled by thousands of bullets.
Now the aliens are naive too. Remember, they basically level the planet but leave enough humans alive to serve their plan. New York is rebelling and yet they send in a ground force to deal with the rebels. You would think that after losing that battle that they would go back with an air campaign. But, instead, they go back with a larger ground force. Rinse and repeat. Allen tries to justify this activity by explaining that the main invasion force has moved on to the next planet leaving a smaller mop-up force behind. But that mom-up force (controlling the whole planet) has no bombers?
It occurred to me as I write this review that there are no female characters in this book. All perspectives are from the handful of male characters. Also, there is no perspective provided from the thousands of survivors that make up the rebel force. There is no resistance to the "we must fight to the bitter end" strategy. There are no questions introduced such as "what about the children?".
I could go on and on highlighting flaws in the arc. Suffice it to say that this book appears to say that if you wish for it hard enough, and are willing to fight to the death, that you can become victorious regardless of the odds.
Clearly, since this is "book 1", that humanity endures at the end of the book. I will not be looking for book 2.
Oh, and under the "what was he thinking" category: This author has already written a book called "Invasion". Why would he name another book "Invasion"?