If you are looking for the ePub version of El Rey Pequeño , it is widely available through major digital retailers:
The author uses the eyes of common people, like the character Pedro, to provide a "ground-level" view of medieval life and royalty. El Rey Pequeno Antonio Perez Henares epub
His uncle, the King of León, seeks to control Castile, leading to a power struggle. If you are looking for the ePub version