A book I recommend

A few years ago, I bought a book called "La séptima M" it was written in 2006 by a Chilean writer, a really young one i must add (she's about 28 now). Her name is Francisca Solar and as i understand she started her carreer writing fan-fictions based on Harry Potter books and The X Files tv show.
The book has something of that, it's about a forensic doctor investigating the suicide of 6 teenagers in Aysen, in a Town called "Puerto Fake". Everyone living there refuses to talk about the deaths of these kids, arguing that it's just depression or a pact with evil forces, cause they all have a scar shaped as a letter M on their necks. I remember i got caught up with this book and the ending was something i never expected. So if you like these genre i think this book's at least worth considering.
I found out now, looking for some information on the author, that she has released a sequel of this book in 2011 called "El Hada de las Cadenas" and she has signed up to write 3 more.