i recommend Obsidian. 
 ***** 
 FIRED UP. 
 Obsidian really got me all hot and bothered in those 6 hours that i read it! It has flaws, yes, but i'm willing to overlook them just for the spine-tingling, nerve-wracking, laughter-inducing moments between Katy and Daemon. Let's just say if you are in the mood to just read, enjoy and relax, try Obsidian. Armentrout will leave you wanting, panting... for more. *ahem* (entering fangirl mode) 
 Katy no longer wants to be a bystander. With Daemon around, she becomes a queen b*tch that she needs to be, since Daemon is a jerk. She's tired of being good ol' Katy, that's why she never backs down from him. I like her. She's as real as any teenager can get. Feisty, angry, and has a filthy mouth (according to Daemon). Now this hot alien... WOW. How come I'm beginning to like obnoxious boys nowadays? Oh well. :) Daemon kept the dialogues alive, spirited, and totally swoon worthy! Man, i believe i have a new book boyfriend, LOL! The thing i love the most about him - he never went from cold to sappy. i thought he's just a regular guy who can't express his true feelings that well. So i really liked the open ending. It leaves much to my imagination. 
 I liked the concept of light versus shadow. the plot reminded me a little of that Roswell tv series though. but Armentrout wrote in such a way that i never thought i was reading. i thought i was hanging out with a friend while she regals me with this alien story that's a little rough on the edges, but entertaining nonetheless. 
 Obsidian is a super fun read if you want to chillax. Smart-mouthed and heart-thumping, Katy and Daemon will surely fire up your senses. This book is HOT. (exiting fangirl mode) 
 ;)