R A Salvatore 
Star Wars: The New Jedi Order — Vector Prime [EPUB ebook] 

Twenty-one years have passed since the defeat of the Empire at the Battle of Endor and the deaths of Darth Vader and Emperor Palpatine. But now the New Republic faces new threats to its peace and prosperity: a charismatic firebrand is inciting war between two planets…reports of rogue Jedi Knights practising vigilante law are sowing seeds of mistrust and fear…and beyond the Outer Rim, a mysterious alien race is mounting an invasion. Against chaos from within and an enemy unlike any other without, can the heroes who overthrew the Empire triumph again?