4.5 stars!! 
 I Really, Really Liked Obsidian 
 The relationship between the main characters is a Love/hate one... which I Absolutely Love! 
 Daemon is SUCH a JERK to Katy ... he Totally gets on her nerves :) 
 I Liked Katy... she isn't a lovestruck, full of hormones, teen idiot... she IS a full of hormones teen (she's 17), but she's a serious, strong minded and independent girl... 
 she knows Daemon's hot and gorgeus and sexy... and she knows she is attracted to him (even if she doesn't want to be)... but she also knows he IS a JERK... and she doesn't Like him or wants anything to do with him! 
 But when the Jerk ends up saving her life! ... and more than once... 
 and when she gets to know him better (even finding out he is an Alien)... and she starts seeing a new Daemon ... a more open one, a nicer one, a protective one... one she can talk to (without wanting to hit)... she wonders: 
 Which is the real Daemon? Is he as indiferent to her as he claims to be OR does he care about her more than he lets on?... If only she could keep the Nice Daemon and drop the Jerk one... 
 I Really enjoyed their bickering and teasing... Daemon ticking Katy off (calling her Kitten) really made me laught! 
 And I must say there was an Extra in the end of the book in Daemon's POV that I Really appreciated! 
 I also really liked Dee's character (Daemon's twin sister) and I would like to see her fall in love ... I wonder if Adam (her supossedly boyfriend) does like her more than she thinks, maybe?! 
 I must add that Besides the "Romance" there is also a nice plot and some action in the book. 
 I won't tell more of the story because I woudn't want to spoil much... 
 You already know there's a sexy, bad boy alien; a serious human girl with a mind of her own, and a love/hate relationship between the two... put in together some POWERS and VILLANS... and what more could you wish for?! 
 DO READ the book! ... I Really Enjoyed it... and anyone who Likes Love/Hate Relationships will most certaintly LOVE this one! 
 Their story continues in book #2 of the Lux Series, Onyx ... which I will probably read in the near future, since I liked this one so much :)