The darkest moment of the day to be alone… Welcome to Eris. The island with one house, one inhabitant, one exit. Cut off from the rest of Scotland for twelve hours every day.

Once, Vanessa lived here. A famous visual artist, whose shamelessly unfaithful husband vanished without a trace twenty years ago. Now, Grace lives here. A solitary tide creature, comfortable in her isolation.

An unexpected and shocking discovery in a gallery in faraway London brings a visitor to the island. And now the secrets of Eris are in danger of coming to the surface...

Paula Hawkins, the author of the #1 global bestseller The Girl on the Train, returns with a masterful novel reminiscent of the finely crafted suspense stories of Shirley Jackson and Patricia Highsmith. The Blue Hour is the most gripping and powerful thriller she has written to date and comes to solidify Hawkins' position among novelists who intricately weave their shades and styles.