A really well-thought-out fanfic: The Early Years por knightchaser 

Very good! Summary: He was a dream come true for a stagnated clan. But what kind of a future does a savior born with cursed blood have? Especially with Madara, Fugaku, Sarutobi and Danzou pulling the strings. Itachi Uchiha's early life from 4 to 13.
palabras clave: itachi uchiha, uchiha clan, sasuke, fugaku, the early years