Get ready to be totally gripped by the suspense-packed and atmospheric new 2025 thriller from the Sunday Times bestselling author of The Girl on the Train.*****'Blew me away. I want to read it again IMMEDIATELY. ' 5-STAR Reader Review*****For twelve hours each day, the Scottish island of Eris is cut off from the mainland. No way in. No way out.The island's only house is home to Grace - content in her own isolation, guarding the island's past. But when a shocking discovery is made in an art gallery in London, Grace receives an unexpected visitor. And the secrets of Eris threaten to emerge.Suddenly, this is a very dangerous time to be alone . . .**INCLUDES A BONUS SHORT STORY FROM THE AUTHOR**Readers are OBSESSED with The Blue Hour!'I soaked up EVERY BIT of this book, savoured every word . . . Brilliant!' 5-STAR Reader Review'An irresistible, GRIPPING story that I was completely immersed in from page one.' 5-STAR Reader Review'Intensely dark, with a brilliant ending. I absolutely LOVED it!' 5-STAR READER REVIEW'Gorgeous and chilling.' SHARI LAPENA, bestselling author of She Didn't See it Coming'Unnervingly unputdownable.' Independent'The best Paula Hawkins yet - by a tense and haunting mile' LEE CHILD, bestselling author of the Jack Reacher series'Extremely hard to put down' MICK HERRON, bestselling author of Slow Horses'A twisty, dark thriller, this is Paula Hawkins' best book since The Girl on the Train' RED'Unforgiving and irresistible' VAL McDERMID, bestselling author of the detective Karen Pirie series'REALLY good. Highly recommended!' MARIAN KEYES, bestselling author of My Favourite Mistake**WINNER of Good Housekeeping UK's GH GOOD BOOKS Collection**The Girl on the Train, global No.1 bestseller, The Bookseller Feb 2024Paula Hawkins, Sunday Times bestseller, September 2025[Cover may vary]