The Book of General Ignorance round differs, in particular during the Christmas specials. During the course of the "B" Series special, Fry and Davies swapped places for "General Ignorance", with Fry attempting to answer questions ostensibly written by Davies to stump him. During "D"s Christmas Special, all the "GI" questions revolved around saints. "The Book of General Ignorance" contains a list of 230 questions, most of which previously appeared in episodes of "QI". Each question explains the correct answer, and usually attempts to show why people tend to make the wrong assumptions, or believe certain myths. Each book contains two forewords, one by Fry, the
And Then There Were None nezostal už nik" ("And Then There Were None") mid-run. The 1930 novel "The Invisible Host" by Gwen Bristow and Bruce Manning has a plot that strongly matches that of Christie's later novel, including a recorded voice announcing to the guests that their sins will be visited upon them by death. "The Invisible Host" was adapted as the 1930 Broadway "The Ninth Guest" by Owen Davis, which itself was adapted as the 1934 film "The Ninth Guest". The 1933 K.B.S. Productions "Sherlock Holmes" film "A Study in Scarlet" follows a strikingly similar plot; it includes a scene where Holmes is shown