In "Undead and Unpopular," the fifth book of the Undead series by MaryJanice Davidson, the story continues to follow Elizabeth "Betsy" Taylor, who is now the queen of the vampires. Betsy is facing increased duties that come with her royal status while still dealing with her personal life, including her friendships and relationships. The narrative highlights her struggles to balance the responsibilities of being a leader with her desire for a normal life. The plot thickens as Betsy encounters new challenges, including a rival faction and the complexities of vampire politics. Additionally, her interactions with her loyal friends and the love of her life, Eric, add depth to her character as she navigates the tumultuous waters of her new role. The humorous tone and Betsy's witty personality shine, making the book an engaging read.