El Enigma del Cuatro = The Rule of Four (Hardcover)
Four seniors at Princeton are hot on the trail of a 500 year old manuscript that the narrator's father was obsessed with.
There is a secret to that manuscript that is apparently important enough
that this becomes life-threatening for the four college students. This
book keeps you turning the pages, wanting to follow the clues as they
unfold and enfold the lives of the characters.
If you like books in the vein of Dan Brown's The Da Vinci Code, you will absolutely love this!