We often hear about the plight of illegal migrants, in particular Africans making the journey to the Italian island of Lampedusa. But we don't know much about the criminals who run "the most ruthless travel agency on the planet". A book published in Italy meets the men who make big money smuggling tens of thousands of desperate people into Europe. Giampaolo Musumeci is one of the authors of Confessions of a People Smuggler.