El secreto de las olas by Gregg Dunnett is a psychological thriller featuring converging storylines about a woman investigating her husband's disappearance and a teenager navigating a mysterious accident, characterized by a slow-burn pace that accelerates in the second half. Praised for its atmospheric coastal setting, the novel features a controversial ending that the author has addressed in a dedicated, in-depth explanation. Read the author's guide to the ending at greggdunnett.co.uk . Reviews - El secreto de las olas | The StoryGraph