"As certain as one can be when it comes to Dumbledore and my godfather." Draco shrugged his shoulders. "Theoretically, it is also possible that the old man only marked the page and researched the book because the rest of his life was so utterly boring... since Potter hadn't caused any trouble for a while. Or he needed the information for someone else... Though I am not aware of anyone else suddenly disappearing and if we believe the author, people have used these curses to protect their most precious items." A grimace showed on his face. "As much of a maniac The Dark Lord is, well, he is unfortunately incredibly smart and very much infatuated with his life."