Discovering America Podcast

How could I talk about the discovery of America without involving this man, Amerigo Vespucci?  His history relies so much on two letters written to a friend.  He mentions a book that would cover the accounts of his voyages, a book never written?  Or just never published and remains in someone’s deep dark cellar?  You can find the letter describing his first voyage at http://www.fordham.edu/halsall/mod/1497vespucci-america.asp