In Italian cinema, Giallo (; plural gialli, from giallo, Italian for yellow) is a genre of mystery fiction and thrillers that often contains slasher, crime fiction, psychological thriller, psychological horror, sexploitation, and, less frequently, supernatural horror elements. This particular style of Italian-produced murder mystery horror-thriller film usually blends the atmosphere and suspense of thriller fiction with elements of horror fiction (such as slasher violence) and eroticism (similar to the French fantastique genre), and often involves a mysterious killer whose identity is not revealed until the final act of the film. The genre developed in the mid-to-late 1960s, peaked in popularity during the 1970s, and subsequently declined in commercial mainstream filmmaking over the next few decades, though examples continue to be produced. It was a predecessor to, and had significant influence on, the later American slasher film genre. Literature In the Italian language, giallo is a genre of novel including any literary genre involving crime and mystery, with all its sub-genres such as crime fiction, detective story, murder mystery or thriller-horror. The term giallo ("yellow") derives from a series of crime-mystery pulp novels entitled Il Giallo Mondadori (Mondadori Yellow), published by Mondadori from 1929 and taking its name from the trademark yellow cover background. The series consisted almost exclusively of Italian translations of mystery novels by British and American writers. These included Agatha Christie, Ellery Queen, Edgar Wallace, Ed McBain, Rex Stout, Edgar Allan Poe and Raymond Chandler. Published as cheap paperbacks, the success of the giallo novels soon began attracting the attention of other Italian publishing houses. They published their own versions and mimicked the yellow covers. The popularity of these series eventually established the word giallo as a synonym in Italian for a mystery novel. In colloquial and media usage in Italy, it also applied to a mysterious or unsolved affair. Film In the film context, for Italian audiences giallo refers to any kind of murder mystery or horror thriller, regardless of its national origin. Meanwhile, English-speaking audiences have used the term giallo to refer specifically to a genre of Italian-produced thriller-horror films known to Italian audiences as giallo all'italiana. In the English-speaking world, Italian giallo films are also sometimes referred to as Spaghetti Thrillers or Spaghetti Slashers, in a similar manner in which Italian Western films and poliziotteschi films from the same period have been referred to as Spaghetti Westerns and Spaghetti crime films, respectively. The Italian film