I've been sitting on this review for a while now as I've been trying to think of some nice, polite and constructive way of writing it. I really cannot be bothered wasting any more time thinking on it, or gathering extensive citations from the text, so here is my overall view.
Aurora: Darwin has a great premise and a long-time Aliens fan I was immediately hooked. Colonial marines! Aliens! Action!
Sadly however, this doesn't deliver on the promise and is a limp and mediocre shadow of a greater theme. (Light spoilers ahead)
The interaction between the marines is as shallow as the characters themselves, with forgettable paper-thin outlines, no development and hardly any meaningful interaction or dialogue. They are completely unprofessional, disrespectful, bigoted and generally unlikeable. I find it hard to believe that in a professional military body, the level of antagonism, obstructionism and purely sexist behaviour would be tolerated; especially in a close-knit team working in dangerous remote sites with no support. None of them has any particular redeeming qualities, nor is any reader emotional investment built up. The main character is dithering, emotional, and annoying person with daddy issues, who just happens to be awesome with a firearm. The quintessential Mary Sue. Despite seeking a professional military career, it seems she can't stop constantly thinking of her peers except as sexual objects either. Go feminism?
On the pulp side, it fails also, with some cringeworthy lines being delivered from supposedly rock-hard tough and wise-ass marines, there's quite a bit of 'chary' dialogue too to fill it out, which also falls flat with the author having long-time career military personnel seemingly confused and freely mixing up civilian and military time references, some of the simplest military jargon to get right.
The novel unfolds wearily slowly, with interminable attention to the nascent romance of the main character. Ho hum, and yes I read romance also, this is badly done. Even the action scenes have hardly any zip and are lackluster. There's a real sense of telling, not showing, and no immediacy.
The aliens, when they appear, are almost completely forgettable, have almost no impact or scare factor, and are generally underwhelming. Logic cast aside, they regularly pull out Deus ex Machina to destroy the marines, who active help them by apparently forgetting every single military doctrine regarding intelligence gathering, comms discipline, security, tactics, close support, or even simple things like covering their flanks, looking behind them, and even forgetting how to use their guns.
Note: I am not in the military, but I know people who are and I think they would shred this like a Sunbeam set to Puree.
It ends with a completely predictable machine-stamped generic closure leaving it open for possible sequels, just like the B-movies it emulates.
Ultimately disappointing, Aurora:Darwin promises a lot in a number of areas but fails to deliver on almost all of them. Personally, I would find it very difficult to summon the enthusiasm to read any more of Bridgeman's work. Perhaps I'm being over critical, but there just wasn't enough depth in for me, nor enough suspense or action to make it a good pulp read.