This book impressed me because I really love books that make me think, where I have to relate actions and people, where there problems to resolve ( I love resolve problems before finish the story) and I really really REALLY LOVE the book that is impredictible to difference the book when you always know how finish, or what thing is gonna happen :/
Other books that impressed me, are: "Edad Prohibida" written by the same writter, "Mi planta de Naranja-Lima" written by José Mauro de Vasconcellos, "Orgullo y Prejuicio" of Jane Austen, "La lista de Schindler" of Thomas Keneally, between others.
Don't read it's too mainstream ;)