"They Never Say When" is a book that belongs to the psychological thriller genre. This is a fascinating story about the mysterious disappearance of a young woman, which forces the reader to ask himself many questions and solve mysteries together with the main characters. The author successfully combines tension in the plot, reflection on the hidden motives of the characters and unexpected turns of events, which makes the book full of emotions and dizzying for the reader. They Never Say When is a piece that will leave you pondering the true values and nature of human relationships.