THE EMOTIONAL, JAW-DROPPING SUNDAY TIMES BESTSELLING THRILLER.AND DON'T MISS CLARE'S NEW BOOK OTHER PEOPLE'S HOUSES - OUT NOW.'Hypnotically good' LEE CHILD'Jaw-dropping twists' LUCY FOLEY'The book of the summer' SUNIt's twenty hours to landing. A lot can happen in twenty hours . . .You're on board the first non-stop flight from London to Sydney. It's a landmark journey, and the world is watching. Shortly after take-off, you receive a chilling anonymous note.There are people on this plane intent on bringing it down - and you're the key to their plan.You'd never help them, even if your life depended on it.But they have your daughter . . . So now you have to choose.DO YOU SAVE HUNDREDS OF LIVES? OR THE ONE THAT MATTERS MOST?'Feels like a blockbuster movie' LISA JEWELL'The queen of nail-biting suspense' IRISH INDEPENDENT'A nail-biter of a thriller' SHARI LAPENA'A rip-roaring finale' GUARDIAN'Propulsive - will have you questioning "what would you do?" at every turn' KARIN SLAUGHTER'Mackintosh is a pro' NEW YORK TIMES'Taking the locked room mystery to a new, white-knuckle extreme, this is electrifying' HEAT'When Clare Mackintosh goes high concept, she doesn't mess around' LINWOOD BARCLAY'An incredibly tense read that has a satisfyingly clever ending' GOOD HOUSEKEEPING'A thrilling rollercoaster of a story. It'll leave you breathless' JANE FALLON'A smart pay-off' THE TIMES, THE BEST THRILLERS FOR JUNE'A tense, convincing, nail-biter of a thriller' ADELE PARKS, PLATINUM MAGAZINE'A banger of a book with a truly agonising "what would you do?"' RUTH WARE'A thrilling, chilling gut-punch of a book' RED'Why did no one warn me how bloody addictive it is?' TAMMY COHEN'I dare anyone to read this high-octane, tense thriller on a flight' PRIMA'I got wrong-footed, then I got whiplash! Mind-blowing' SANDIE JONES'The year's most intriguing high-concept plot' DAILY EXPRESS'Full of mystery, tension and emotion. An incredible thriller' ALLIE REYNOLDS'Buckle up for some edge-of-your-plane-seat action' FABULOUS