Video: In a lively, adorably nerdy chat, fantasy authors Sabaa Tahir (An Ember in the Ashes) and Patrick Rothfuss (The Kingkiller Chronicle) discuss the pressures of following a successful debut with a sequel, take on topics like writer's block (and whether or not it actually exists), and answer Twitter-submitted fan questions. Yes, Rothfuss' majestic beard gets a shout-out.