Rafael Sabatini 
The Life of Cesare Borgia [EPUB ebook] 
A History and Some Criticisms

Although the House of Borgia, which gave to the Church of Rome two popes and at least one saint, is to be traced back to the eleventh century, claiming as it does to have its source in the Kings of Aragon, we shall take up its history for our purposes with the birth at the city of Xativa, in the kingdom of Valencia, on December 30, 1378, of Alonso de Borja, the son of Don Juan Domingo de Borja and his wife Doña Francisca.
To this Don Alonso de Borja is due the rise of his family to its stupendous eminence. An able, upright, vigorous-minded man, he became a Professor and Doctor of Jurisprudence at the University of Lerida, and afterwards served Alfonso I of Aragon, King of Naples and the Two Sicilies, in the capacity of secretary. This office he filled with the distinction that was to be expected from one so peculiarly fitted for it by the character of the studies he had pursued.