This is a list of fictional diaries categorized by type, including fictional works in diary form, diaries appearing in fictional works, and hoax diaries. The first category, fictional works in diary form, lists fictional works where the story, or a major part of the story, is told in the form of a character's diary. Diary form is frequently used in fiction for young adults and tweens as well as adults. It has been used for multiple books in a series following the diarist's life over many years, such as the Adrian Mole series, the Diary of a Wimpy Kid series, and the Dork Diaries series, all of which chronicle the lives of characters who start a diary as children or adolescents and continue their diary as they mature over time. Fictionalised diaries set during distinct historical periods or