"Dead as a Doornail" is the fifth book in the Southern Vampire Mysteries series by Charlaine Harris, following the story of Sookie Stackhouse, a telepathic waitress living in a world where vampires and other supernatural beings are integrated into society. In this installment, Sookie finds herself embroiled in a murder investigation when a series of mysterious killings occur in her small town of Bon Temps, Louisiana. She is determined to uncover the truth to protect her loved ones and herself from the dangerous forces at play. The plot thickens as Sookie navigates complex relationships with various supernatural beings, including her vampire boyfriend Bill Compton and werewolf Alcide Herveaux. Tensions rise with the local werewolves as they become central to the unfolding mystery. Sookie's unique abilities make her a target, and she must rely on her wit and courage to survive the escalating threats while balancing her feelings for the men in her life.