In this reading group, we will read and discuss Timothy Williamson's latest book, 'Modal Logic as Metaphysics'. The reading group will run on a weekly basis for two semesters. The meetings will be held on Tuesdays, from 15:00 until 17:00, in the seminar room of the Department of Logic, History and Philosophy of Science. The first meeting will be on the 5th of November, 2013.