The diaries feature a great deal of background information, far more than could reasonably be put into the novels. However, some of this occasionally finds its way into the series proper - the concept of female assassins and the character of Miss Alice Band were two notable ideas that first appeared in the Assassins' Guild Yearbook. All the diaries are illustrated by Paul Kidby. The diaries are: There were no diaries published between 2004 and 2006, although a similar book, The Discworld Almanak by Pratchett and Bernard Pearson was published in 2004.