Well wow!! This book was creepy & delicious for sure. I haven't read a book with this "creep out" level since Katie Alendar's Series.
In the beginning of this books it seemed just like a search and research book with a little romance...something like a contemperary..but about halfway through you learn that there is sooo much more going on: ghosts, circus paraphernalia and creepy weird people...and of course dolls and toys. I know, scary as crap right. lol
As far as characters, My fave would have to be Lacey. I think i can relate to her the most. She seems the most sensible to me. I like Cassie & Missouri next because they are strong. Id have to say that i like Aisha the least. She just seems whiny and childish to me and i dont like it. I am not sure yet about Jessamine or Ethan. They both have a shroud over them and its really hard to tell if they can be trusted or not. I certainly don't like Henry...Frreeeaak. All the characters were written very well. They were deep, unique and well defined.
As far as world building and setting, i think the author did an awesome job. She is very descriptive in the writing without the "info dump" feeling. I could clearly see most of the scenery pretty easily in my head. I was pretty scared on some parts, but awesome none the less. I'm not sure if this is the author's first book, but it is very well written.
Overall, i would def recommend this book to anyone who enjoys creepy books. It's an awesome books and i found no flaws at all. It's pretty safe for all YA ages since it only contains very vague references to sex, drugs, drinking, but nothing direct.