Stefano Bartezzaghi is a puzzle maker, journalist, and semiologist. Since 1987, he has been editing a weekly column on language games and publishing a daily crossword puzzle in La Repubblica. He teaches Semiotics of Creativity at the IULM University in Milan. Pier Mauro Tamburini is a screenwriter, director, writer, and one of Italy's leading experts on gamebooks. He has written Uncorrected Proofs, Cold Cases, The Island of Mysteries, and, under the pseudonym Leonardo Lupo, co-created the famous Escape Book series. In 2010, he co-founded La Buoncostume, an artistic collective with which he has written many TV programs and series, and published several novels.
