The world of the living may have turned its back on her, but she's no damned Scourge...It's the story of Lilian Voss!
Short Story: Edge of Night http://us.battle.net/wow/en/game/lore/leader-story/sylvanas-windrunner/1
Comic: World of Warcraft - Ashbringer
Game: World of Warcraft (Cataclysm)
How did Lilian die? http://wow.joystiq.com/2011/01/02/know-your-lore-the-unfortunate-tale-of-lilian-voss/