Mario Puzo's 'The Sicilian'
The novel is a follow up to 'The Godfather', based on the latter part of Michael Corleone's time spent in Sicily after killing Sollozzo and the police chief in the preceding book. Michael is tasked by his father with trying to bring an outlaw from the island home to America. The book switches between present day (1950) and the story of the earlier life of the bandit, Salvatore Giuiliano, who is based on a real person of the same name ( http://en.m.wikipedia.org/wiki/Salvatore_Giuliano ).
It's an absolutely cracking read and one of my favourite ever books, although I must admit I am a massive fan of Puzo and The Godfather (book/films). It fills in a bit of a gap in the original story which I felt was maybe rushed over a little. It also gives a brilliant insight into the history of Sicily itself, with its crippling poverty and the struggle of its citizens to deal with the oppression of the mafia and from Rome itself.
10/10 from me