The Darkness Outside Us

This was very enjoyable sci-fi that wasn't quite as "hard" as it thought it was. The author consulted with NASA and gave a pretty good look at what long term space travel would be like, but some issues were pure magic or were handwaved. I agree with one of the prominent reviews here that there was no story reason for the characters to be 17 years old.

Making this a US/Soviet retro-futuristic conflict was an interesting choice that I'm thinking over.

Choosing the name "Cusk" was unfortunate.

This was good enough that I'll read the sequel when it comes out, but I wonder where the sequel can go. This is a pretty closed loop of a story. Seems difficult to come up with a new mystery for the next book.

Also, if you're going to have sex on a spacecraft, and there's a zero G area, you're going to try it in the zero G area at least once.

THE DARKNESS OUTSIDE US features two older teens on a space mission to rescue Ambrose's sister. When little things stop adding up, the more Ambrose and Kodiak try to find out what's happening, the more the A.I. gets in their way.

The plot takes a while to get going, the beginning is a lot of worldbuilding which is usually smoothly conveyed, but occasionally veers into thinly veiled infodumps. Once things get going (somewhere between a third and halfway in) they pick up quickly and the story becomes very engaging. It has much of what I love most about time loop stories without technically being one. I was initially hesitant about the relationship between Ambrose and Kodiak, their chemistry grew slowly and I'm a bit too demi to buy into a romance driven by being the only two people they can interact with, but once I accepted that they clearly like each other I was able to settle in and enjoy the story. 

They're from two different countries (apparently the only two countries on Earth at the time of their ship's launch), which are implied to be Russia and an Anglophone country (I'm pretty sure this is supported by the actual text, the audiobook narrator used a Russian accent for Kodiak and a British one for Ambrose which may have affected how I interpreted the story. They make reference to a cold war, so I'm pretty sure that's what was happening. This felt a bit off to me from a worldbuilding angle because there are other large countries who could just as easily have been used as the starting point for the two remaining world powers, but I think the choice ends up working. With that small caveat, I love the second half of the book, I had an excellent time and didn't want it to end. 

I would highly recommend this, except for my uneasiness about the country choices and the fact that in the first quarter I almost didn't finish it because of the slow pacing and how I wasn't getting into the romance at first. If you want a groundhog day story about gay love in space, with a possibly hostile A.I., try this.