Enjoyable and Adorable
As this book is part of a series, I will keep the review (fairly) short and non-spoilery - even if you haven't read Obsidian you won't be spoiled.
I'll first say that the Lux series as a whole is a very fun and entertaining paranormal romance which will keep you coming back for more. Obsidian follows Katy, a girl who moves to a small town with her mum, and her new life there - which happens to involve her alien neighbours. Yup, you read that right. As long as you don't take the books too seriously, I guarantee that you will enjoy them. They start off pretty lighthearted but as the series goes on it gets a little more serious without losing the humour element. So, if you haven't started this series yet, I highly recommend that you do!
Origin itself started off a little slow for me, and I definitely enjoyed the second half a lot more. The action scenes were probably my favourites, but I did enjoy the romance of it as well. Admittedly, Origin was a little predictable. Was this due to me reading the blurb even though I knew from the previous books that the blurbs always give away half the story? Uh, most likely... Did it take away from my enjoyment? Absolutely not! I still felt the expected emotions at the plot twists and damn, were they strong emotions. But seriously, if you haven't read these books, don't read the blurbs! I have grown quite attached to the characters - this is the fourth book, after all - but I feel like a couple of my favourites weren't as present in this book as I would have liked them to be, as the focus was on the main two characters. I can understand why this was the case, and I'm hoping it'll be different in Opposition.
Another thing I had a problem with was the dual perspective. After reading only from Katy's perspective in the preceding novels, it was a bit strange to suddenly have another point of view and I kept forgetting which character was speaking. Fortunately, the different point of views changed fairly often so I never got sick of either one.
As I mentioned before, the action scenes were my favourite. I really got sucked into them and forgot that I had an actual life outside of this story :P There were also some incredibly adorable moments in this book that had me grinning from ear to ear. I loved the jokes and realistic voices of the characters.
If you're looking for a story with a good mix of funny, paranormal, romance and also serious elements, look no further than this series!