An exclusive swingers’ club in Marbella. Several suspicious deaths. An undercover inspector and criminologist determined to solve the case, unaware that the woman he has just met works for the police. In Vicio, desire does more than just create difficulties in the investigation: it can make anyone a suspect.
Homicide inspector Roma Rossi goes undercover at the club connecting all the victims. She needs to uncover what happens behind its doors without revealing who she is, something that becomes more difficult when she meets Leo Vera, a criminologist and host of a popular true crime podcast. He is also following the trail of the murders, but neither of them knows the other’s true identity or intentions.
This double game leads to a plot in which every encounter could be a clue, a lie or a reckless mistake. As Roma and Leo try to stay one step ahead of the killer, their mutual attraction creates another danger: trusting the wrong person when you do not know who is standing in front of you.
In Vicio, Nina Sweet combines criminal suspense with a relationship built on secrets, suspicion, and a tension that is impossible to ignore. Marbella provides the perfect setting for the story: luxury, flawless appearances, and private lives that few are willing to expose. The result is a provocative, addictive novel packed with twists, for readers who enjoy solving a crime as much as being swept away by a romance.
Nina Sweet is the pen name Paz Castelló uses for her romantic suspense novels. After making a splash in 2024 with Lo prohibido, the author returns to a genre that brings together two of her greatest strengths: the intrigue that has defined her career as a thriller writer and the intensity of a story driven by desire. Under her own name, she has published titles including Mi nombre escrito en la puerta de un váter, La llave 104, Dieciocho meses y un día and Ninguna de nosotras tendrá compasión.
Vicio is out now in bookshops, promising an investigation in which finding out who the killer is is just as important as discovering who is lying.
