Dial L for Loser is a novel that is part of the #1 New York Times Bestselling Series, A Clique Novel, by the author Lisi Harrison. The story follows the five main characters of the book, Massie Block, Kristen Gregory, Alicia Rivera, Dylan Marvil and Claire Lyons, after they are expelled from school. Each of the five girls is also a member of The Pretty Committee, which is the group of the most popular girls in their all girls' school. While visiting the set of Dylan's mother's TV talk show, the five girls meet the director Rupert Mann, who is directing the new movie, Dial L for Loser.

After hearing Dylan over the microphone, the two stars of the movie get into a fight on live TV and one of them quits. This forces Rupert to cast a new actress in the role of Molly. Molly is a loser who pays someone at her school to turn her into a popular girl. After borrowing Massie's cell phone on set, Rupert announces on another TV interview that he is looking for talent among the owner of the cell phone he still has and the girls who were with the owner.

Three of the five girls are allowed to audition for the part—Claire, Massie and Alicia. After each auditions, Rupert casts the least likely of the three in the part—Claire. As Claire embarks on her new life as a starlet, Massie and Alicia seek revenge. By the end of the novel, Claire, Massie and Alicia learn the value of true friendship. The girls also learn about the cold-hard truth of humiliation and forgiveness.