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
Agatha Christie: And Then There Were None reviewers polarized in their opinions: some calling it a good adaptation of the novel; others, an extremely poor adventure game. Several reviews harshly criticized the game's character design and graphics as being archaic and outdated, whereas others praised aspects such as character dialogue and a captivating story. "And Then There Were None" is a point-and-click adventure game, played from a third-person perspective. Most of the interactive elements of "And Then There Were None" consist of asking other characters questions, and collecting and combining items. The player can carry items using an inventory system, consisting of screens which can show up