"The whole idea was the cheapest sort of bargain-basement sci-fi."
- pg. 125 (paperback edition)
It's tempting to just let this sentence from the book itself stand as my review, but then I thought, "nah, I love writing bad reviews" and also, "how often do I get to use the word, pap in my reviews?"
This book is repetitive, military, sci-fi pap.
It starts off promising - first with with a time traveling Nazi, and then followed by some Navy SEALs in ghillie suits spying on the North Koreans when a UFO flies over and destroys a nuclear testing site - but then quickly crumbles into a nonsensical, expositional quagmire.
First of all, it's BORING. It's non-stop military jargon and acronyms, made worse by a massive cast of characters who are flatter than Flat Stanley himself (many of whom get names only to immediately die in the alien battle scenes that happen in the last ~75 pages of the book). Hunter, our main dude, is kind of an asshole and your stereotypical military machismo type, but that's about it - at one point he gets butt hurt because a woman with a PhD and vastly more knowledge/experience with aliens than him is explaining things to him and he thinks she's being "condescending" and will really only listen to the other guy in the room (and then this female character, just, vanishes, and isn't mentioned again in the rest of the book). All the women are "amazingly gorgeous" or something along those lines. I'm not going back for a real quote; at least Douglas mostly just refers to their eyes and not their tits, so progress?? I guess.
The aliens are a mixed bag.
(Here be spoilers, I'm not spoiler tagging them because I don't care if I spoil this book for you, but I have delineated them.)
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Grays - your basic tiny little gray X-files alien with the big black eyes and no teeth.
Saurians - looks similar to a Gray, but a little taller, scalier, and with gold eyes and crocodile teeth.
Nordics/Talis - Taller, lankier, sexier humans, with bigger sexier eyes. They are gorgeous. They call themselves Talis, and the US government types call them Nordics because they are super blonde and blue-eyed (so, because racism).
Also, none of the above are aliens at all!
Because this book isn't just about time traveling Nazis, it's about time traveling future humans! The Grays and Talis are both humans who have evolved differently. They time travel all over the place, and *WILL* give all the present day humans all kinds of fancy technology, but *WON'T* give them information. Because time travel paradoxes, ursumshit.
The Saurians are time traveling dinosaurs. This is supposed to be a ~~BIG REVEAL~~ or twist or something, because they've been kidnapping humans, and mind controlling Grays, and might also be at war with the Grays, and might have manipulated the human evolutionary path, and might be dino-human hybrids, and might be lizard people taking over the government, and and and...??? No one really seems to know what the Saurians deal is (including Ian Douglas). They definitely helped the Nazis. And they might be helping the US. And they might be helping the Russians? They are definitely helping themselves.
There are some actual aliens, such as the Xaxki/Dreamers and their Guardians, who can somehow dream physical things into existence (like giant battle pillbugs, and actual weapons). They are the best, tiniest part of the book and the new alien worlds being encountered by our humans, and I suspect they will feature more prominently in the sequels, but I'm not going to read those.
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Anyway, before you get to the fun Xaxki, you have to slog through all the military jargon, the repetitive nature of chapters and chapters of exposition (sprinkled with copious amounts of "four-niner-niner cleared for launch" style checklists of people with stupid nicknames flying spaceships), and POV switching where each set of characters is having the exact same thoughts (why does my battery pack only give my laser gun 4 shots? they call that Saurian ship a "sports model").
Oh, and the "training" of making a rag-tag bunch of military elites form a cohesive unit. Apparently all this takes is forcing a homophobe to live with the gay guy ala the camp scene in The Parent Trap, and coming up with a new "hoorah" noise to make at each other that indicates they are no longer Navy, Army, Marine, Air Force, etc, but the Just One! Arrrr!
Most of these people die anyway, so it's kind of irrelevant in the long run. They have basically no training on their weapons for REASONS and there is a lot of disobeying orders, a little bit of the old Independence Day-style beating up an alien because people are bigger, and of course a giant deus ex machina to save the day.
Wrap it all up in more sci-fi jargon than is necessary trying to (poorly) explain the tech, and how they need to avoid creating paradoxes, while at the same time they've clearly been creating new timelines in a vast multiverse while doing all of their exploring and such. Like, dude, pick a damn lane, is this space travel and aliens? or is this multiverse and parallel evolutions? Because this ~waves hands~ is not working.
In sum, this is not a good book. It lacks clear plot direction, any semblance of character development, and its attempt at being comprehensible is scattershot at best.
Lastly, because this is hilarious and in the epilogue... (More spoilers ahead)
It basically rips off a time travel paradox scene from Harry Potter and the Prisoner of Azkaban.
(Note: I don't read enough time travel novels to know if JKR ripped off this scene from anywhere else herself, but I can't recall it in anything else I've read.)
Remember when Harry and Hermione are attacked by the Dementors and saved at the last minute by a Patronus cast by some unknown figure that Harry mistakes for his dad? And then when the two of them travel back in time to save Buckbeak and Sirius, it turns out Harry saved them himself? Yeah, Douglas sort of does the same thing, minus the saving part.
At the beginning when Hunter sees the UFO over North Korea, he sees an alien waving to him from the space ship. In the epilogue, he gets taken on a secret mission, and it turns out he's gone back in time aboard a not-actually-so-alien space ship to North Korea and he's waving to himself.