** spoiler alert ** 
 I say it's 4.5 stars. 
 I was just sad at the death of Reese, cause now Silla not only lost her parents, but her brother. I couldn't believe it. I thought that they'd find a way to cure him, but then he died. 
 I loved the characters though, and the storyline was good. I really thought Lilith was the bad one, but then it proved to be someone else. 
 Awesome cover, and awesome story. 
 Now I can't wait to read the sequel if there is one :)