I originally read the first two books in the Lux series in 2016 and I was obsessed. It felt like Twilight but with Aliens and I was HERE for it. I never finished the series, so I decided I would put it on my TBR for this year. I don't remember most of Obsidian and Onyx so maybe I've grown out of it but I was so disappointed by Shadows. The relationship was a complete insta-love and the dialogue was so cringy at times. My main gripe is that the romance left nothing to be desired. If the characters felt it, they said it. There was no tension, no surprise, no "will they, won't they?". I remember Obsidian having much more push/pull, maybe even a little enemies to lovers vibe and that's what I was looking for here. 

I did not vibe with the constantly using "like a girl" as an insult (but again I know this was written 10 years ago and maybe JLA has evolved since then). I am not a huge fan of novella's so that likely lends itself to my distaste for this book. I don't feel like this added much to the main story, but, maybe I'll feel differently once I re-read the first book.