[2] In May 2013, he resigned from the position of Senior Lecturer at the Open University.
and was the co-author of Reading Political Philosophy: Machiavelli to Mill.
He has written extensively about photography, particularly about Bill Brandt, and wrote a biography of the modernist architect Ernő Goldfinger.
[4] He writes a weekly column "Everyday Philosophy" for The New European newspaper.
He runs a philosophy weblog Virtual Philosopher[5] and with David Edmonds regularly podcasts interviews with top philosophers on a range of subjects at Philosophy Bites.