El Valle de los Lobos is my favourite book. It was written by Laura Gallego and is the first of a collection of four books. The main characters are Dana and Kai, and there are other secondary characters like: Fenris, Maritta, el Maestro... Laura Gallego has already written a lot of books like: el Coleccionista de Relojes.
The book is about a girl called Dana that lived with her family in a farm. Her family was poor but they were very honest. When Dana was 8 she met a boy called Kai and 4 years later they send her to a Tower to learn magic, but something mysterious happened there.
I like a lot this book but it's a bit short. I recommend it to persons who like fantasy books.