I gave 2 /5 for this book since I think it's not well rounded. 
 - I liked the magic part of the book with the ghosts and the cats that try to help. 
 - The case was also quite interesting in itself 
 - Most of the time I enjoyed Willa, since she's not afraid and want's to go deep down to understand things. 
 For the most part, I didn't like the way the book was written : 
 - There is a LOT of repetition : the color of the cat's eye (or anyone's eye), the fact that she wasn't getting used to ghosts appearing near her, etc. 
 - I found that there wasn't a lot of background information on Willa or any other character. (view spoiler)[ What kind of accident did she suffer? What happened so that she can now see ghosts? (hide spoiler)] 
 - We know Willa used to be a crime journalist. However, she makes so many mistakes in this case! She only focuses on one suspect and tries to find evidence that leads to this suspect. Doesn't listen to advices that are given to her. She doesn't see that some links between places and people don't make any sense... All this is quite confusing for the reader since she is supposed to know about that kind of stuff... 
 Finally, the ending is REALLY bad! I know there are other books in this serie but you can't just leave the reader like that! The characters think the case is resolved but the reader knows it's not. Too many questions are left unanswered and I hate that. Thus, I won't read the other books.