This is a great mystery that I have loved for years! Manuel is a boy who lives in Argentina with Leti and Lucas, Leti being his older sister. He works at a pizza place in the neighborhood on weekend afternoons, and one day delivers to the old man who lives above the pizza restaurant. He shows Manu his stamps, and a very special stamp that he says is extremely rare and valuable. Later, Don Mauricio (the old man) winds up dead, and Manu just nows that it was about the stamp. But when he tries to tell someone, they won't believe that the stamp could be of any value and that Don Mauricio was murdered. So Manu has to solve it himself, without getting caught by Leti or the murderer.
I would recommend this book to pretty much anyone and everyone- if they can read spanish.
-Emilia, 7th grade, VLUS
