Pebbles, Vol. 37

1. All hail the Brits: This is how politics is supposed to be done (Tim Harford)

2. Martin Amis' disowned book: Invasion of the Space Invaders, including a cameo appearance by Christopher Hitchens (Mark O'Connell) (via)

3. Advances in interrogation techniques (xkcd)

4. No link found between junk food availability in schools and pupils' obesity (Nicholas Bakalar)