@Maddus Mattus: There never were any official 7,8,9 books, but the fiction authors tended to use each other's storylines. Big ones were Timothy Zahn's (http://en.wikipedia.org/wiki/The_Thrawn_trilogy) and Kevin J. Anderson's (http://en.wikipedia.org/wiki/The_Jedi_Academy_trilogy).
Apparently, the new movies will be original stories (http://www.eonline.com/news/358685/star-wars-7-plot-will-be-an-original-story-says-lucasfilm-source)
Awww... I was really hoping for Thrawn too