The book "Citas Manual de" by Gonçalo JN Dias is a gripping and intense thriller that will keep you on the edge of your seat from start to finish.

The story follows two narrators, Oscar, a skilled police officer, and Marina, a married woman who finds herself in a passionate affair with a coworker, as they navigate a complex web of clues and red herrings in search of the truth behind a heinous murder. With its fast-paced and engaging narrative, this book is perfect for anyone looking for a thrilling read that will keep them guessing until the very end.

The author's use of two narrators adds an extra layer of depth to the story, allowing readers to see the investigation from multiple perspectives and gain a more complete understanding of the events as they unfold. Despite some minor flaws in the investigation, the book is overall well-written and engaging, with a thought-provoking exploration of the themes of love, betrayal, and justice.

The characters are well-developed and relatable, making it easy for readers to become invested in their stories and root for their favorite protagonists. Overall, "Citas Manual de" is a must-read for fans of psychological thrillers and those looking for a gripping and intense story that will keep them on the edge of their seats from start to finish.