Jean-François Dugas has taken to Twitter to answer questions about Deus Ex: Mankind Divided, the upcoming continuation of the shooter/RPG series. Along the way he says that while they won't duplicate the throwback 1999 Mode from BioShock Infinite, there will still be an old-school challenge, as he tweets: "We'll have the 'Give me Deus Ex' again. Not exactly like the 1999 mode but you should expect a real challenge." He also says the entire game can be ghostable, including the boss battles. Finally, he also retweets this tweet offering a free Deus Ex e-book. Thanks WCCF Tech via TweakTown.