Marco Zatterin, born in Roma (Italy), August 1961. Lives in Torino where he works as a journalist for La Stampa. A sherlockian scholar and collector since the early age, he is one of the founding members of the Italian society Uno Studio in Holmes. He wrote “Sherlock Holmes – Indagine su un mito centenario” (1987) and “In viaggio con Sherlock Holmes” (1984). He contributed to several sherlockian books: among these, “Agenda Sherlockiana” (1987), “l fantasma di Sherlock Holmes” (1988), “I diciasette scalini”. He’s regular contributor to the italian Strand Magazine. He also wrote the comedy “Sherlock Holmes e il mistero della Tomba Egizia” that was staged at the Teatro Stabile del Giallo, Roma, from 22 december 2001 to the 2 Febraury 2002.