I feel like this book is the platonic ideal of a 2-star novel. Its not awful. I mean, I finished it, even if a bit grudgingly after a point. There are even some really neat ideas here, but they are so underwhelmingly executed that I can't even rate it as mediocre. In a way, the suggestion of promise made it even more disappointing to me.
That promise is on full display in the early going. The writing is propulsive, perfectly befitting the somewhat gimmicky parkour premise. As the book reaches the climax of its first major set piece, I was totally sold on this world and its characters and eager to learn more, turning each page with the intensity of the novel's protagonist hurling herself forward through the space station setting. The crux of the book's flaws is that we kind of never really do learn more. Both character development and world-building just never take hold. The seeds are there and you can get the sense that the author sees a much more expansive universe these characters inhabit but it just doesn't make it to the page. Eventually it devolves into a series of utterly unearned twists that become increasingly absurd and often insulting. I frequently found myself more curious about some of the stories the book wasn't telling, but it started to feel like each of those alternate directions would get aggressively cauterized off, as if the book knew I was restlessly looking away from its main narrative. That's not even touching on the book's succession of cartoonishly broad villains who telegraphed their every fiendishly evil deed. The most disappointing thing is had the causes of the lead antagonists been treated with respect rather than as the machinations of one-note monsters, the book might have been a good deal better. There is an interesting story here in treating the villain's aims with some subtlety and empathy, but that story isn't being told here.
Obviously, for some readers those twists and turns are there own excitement, but I just felt they were all woefully hollow and lacked the development necessary for me to have really invested in them. I wanted to know more about the characters. I wanted to know more about the society. Heck, I wanted to know a lot more about the geography of the book's setting. You can tell the author has a clear picture in his head, but it just never came into focus for me which made a lot of sequences difficult to follow. The book isn't a disaster, but the blueprint for a much better story are all here which made the experience frustratingly unfulfilling. In the early going, it was the kind of story you want to see adapted into a movie because the action was so vividly drawn. In the end, it was the kind of story you want to see adapted to see if someone else can correct its many miscues.