Check out this review and more at On the Wings of Books 
 What I Thought... 
 * Origin is my favorite in the series so far. We'll see what happens in Opposition but Armentrout has her work cut out to beat Origin! 
 * Orgin was pretty fast paced, and kept me guessing as to what would happen next. There is also more information about what's going on in Daedalus (it's not good) and more info about the Lux, Arum and other extraterrestrial business. 
 * This is really the first time that I felt a lot of alien vibes in the series. I'm not a fan of aliens, but these ones are alright I guess so this are essentially just like humans, but with powers. Which I guess is my issue with the aliens. I find it hard to believe that an alien species from a planet far, far away would look just like humans, and be able to act just like humans and all that jazz. I just don't buy that kind of alien, however it works for me because it's the only kind of alien I can handle. 
 * TRUST NO ONE. EVER. 
 * Seriously, you can't trust anyone. Between the last book and this one there was so much backstabbing and deviousness, it was crazy. 
 * The ending killed me. There was so much that I did not expect. (view spoiler)[The deaths of Ash and Andrew were the worst. The worst. They already lost Adam and to lose them too was just awful. Though I am kind of glad she killed off Ash after she killed off Andrew because I don't think Ash would have been ok by herself. (hide spoiler)] Origin had a big reveal, which I saw coming, and then a cliffhanger of an ending! 
 Overall I can't wait to read the conclusion to the Lux series, I must know what happens next!