David Cartwright has published widely on Schopenhauer. He has edited Payne's translations of On the Will in Nature (1992) and On Vision and Colors (1994) for which he also wrote introductions. He is the author of numerous articles and has also published the Historical Dictionary of Schopenhauer's Philosophy (2005). Christopher Janaway is the author of the Very Short Introduction to Schopenhauer (2002) and Self and World in Schopenhauer's Philosophy (OUP, 1989), and two edited collections: The Cambridge Companion to Schopenhauer (1999) and Willing and Nothingness: Schopenhauer as Nietzsche's Educator (OUP, 1998). He has also translated the Two Fundamental Problems as part of the six-volume Cambridge Edition of the Works of Arthur Schopenhauer (2009).