I highly recommend Origin. 
 Ah, Daemon. Such sweet, good vibes you have here. (Hi, Archer. *blushes*) 
 Admittedly, Origin is just a 4-star-rating, but that unexpected cliffhanger was a welcome reprieve screaming for a 5. And to think that Jennifer L. Armentrout is hugely selling this Lux series to me because of the sizzling romance between Katy and Daemon, I would never thought that she would take that path to awesomeness! :) 
 Daemon's POV is so strong. This is the alien who will move the universe for me, err, for Katy. Heh. A softer side from one who is often a jerk, Daemon proved that what he have with Katy is not a fling with some human. And the decisions he made were so unlike him! He was unpredictable but in a good way. I liked how he turned out in Origin. 
 Katy's having a bad day. No, the worst week ever. She doesn't cower to anyone anymore (thanks to Daemon), so it appears that Katy is stronger, and smarter. Those sweet moments with Daemon were, as always, to-die-for. =) I think their relationship gets better after every book, and that's the point of it all, right? That these characters grow up, and be better people, especially when they are together. But it's not that simple for them, far from it, so there enters the complications being an alien hybrid. 
 Archer!!! 'nuff said. I hope to see more of this guy soon. Yay! 
 The nature of origins is interesting. But are they friends or foes? 
 A lot of action, swoon, and surprising twists, that will have you begging for the next installment the moment you finish Origin. I, for one, could not wait for Opposition. This is gonna be one hell of a war. *smiles wickedly*