The three biggest Italian mafias remain a powerful presence, with tentacles reaching deep inside Italian business and politics, but our understanding of them is marred by myths and misconceptions. Professor John Dickie of University College London, author of three books on the mafia, recommends what to read to get a better understanding of what the mafia really is.

Inner-city crime is a matter of deprivation not race. It comes from a street culture that respects extreme violence, says Gavin Knight, an author who spent two years among British gangs and the police units covering them

'If you go to Palermo and say, “I’m researching the Mafia,” they laugh a lot. First of all they laugh a lot, and then they kill you.'