Milano calibro 9 is a 1969 short story collection by the Italian writer Giorgio Scerbanenco.

It contains 22 stories concerned with the underworld of Milan.

The book has been translated to French and Spanish.

[1] Stories from book were the basis for the 1972 film Caliber 9, directed by Fernando Di Leo, and the 1976 film Young, Violent, Dangerous, directed by Romolo Guerrieri.

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