Eragon

 Christopher Paolini is one of my son’s favorite authors.  He started reading the first book when he was in 5th grade.  The whole series of books is called The Inheritance Cycle.  He started writing Eragon, the first book in the series, when he was 15.  He was being homeschooled at the time and his family was crucial in helping him publish his first book.  In fact, a character in his book is named Angela, after his sister.