I liked this book, despite the star rating. So don't get me wrong, it can be enjoyable. But objectively, it's pretty terrible, and it takes the right kind of reader to want to press on with this series past the first book.
First of all, there's no plot. There's nothing cohesive holding the story together, other than it's the sequential incidents in Ia's life. I feel like what Johnson chooses to show versus what we don't get to see makes for a rather sporadic mess at times, considering there's no overall thesis to the work. It's just Event_01, Event_02, Event_03...Event_N, Big Finish. And then a few more after events.
Second, Ia is perfect. Like, literally, completely perfect. When she makes a mistake or doesn't execute beautifully, it's by design. Johnson's idea of giving Ia a weakness is neglecting to give Ia the same superpowers that a comic book hero might have *with the same intensity*. She's still super strong, super fast, able to manipulate electricity, alter people's minds, etc. She computes probabilities like a machine. Oh, and of course, see the future.
It's the fact that she sees the future that both makes and breaks her as a character. She's able to do everything just so, because of her precognitive abilites, yet it's also the reason why her character kind of works. If she was doing anything other than rescuing the known universe from the tiniest possibility of salvation, the series would fall flat.
As it is, the story is 100% about Ia. The other characters don't matter. Bennie doesn't matter. Meyun doesn't matter. Her family doesn't matter. Sure, they all put in an appearance, but I have absolutely no reason to care about any of them.
So when Ia *isn't* able to accomplish something, it feels contrived. When there's a cloudy area in her predict-the-future skills, it's because it's convenient to the author. When her psi strength fails, it's because the enemy has somehow conveniently invented a psi blocking machine, even though (a) there's no reason to believe a species without psis would be likely to figure out how to do so, and (b) Ia still overpowers the machine anyway. We're certainly never afraid of her failure, even when she's rattling off the percent chance that something won't succeed. Background that accommodates for it or not, Ia's imperviousness is just a pinch too extreme. She's not afraid of anything, there's nothing that can possibly weaken her. We thought we might see a chink in her armor finally, here, with a potential love interest...nope.
I could rag on this story at length. And yet, for reasons I can't fully explain, I still liked it. All the while I'm complaining to myself about what the story does or does not do, and how I could write a better novel, I'm still turning the pages. I don't know what that says, but I maintain: Ia's story is not for everyone.