Down By The Water: The compulsive page turner you won't want to miss

One photo. Seven friends. And a strange face, none of them recognise. "I loved it - a classy and clever subversion of a country house mystery" Harriet Tyce** A Sunday Times crime book of the month**'The end, when it comes, is as unexpected and smart as it gets' ? ? ? ? ? READER REVIEW'I was kept up all night' ? ? ? ? ? READER REVIEW'I loved this book, and read the whole thing in two sittings' ? ? ? ? ? READER REVIEWA group of old friends gather at a remote Scottish castle, one last weekend before Georgie's wedding.Down at the loch, they take a group photo - but what they see stops them cold. Because there's a stranger behind them. None of them saw him, and nobody knows where he went.They're miles from the nearest town. Where did he come from, and where did he go?As the weekend unravels and terrible secrets come to light, it soon becomes clear that their perfect weekend is turning into a perfect nightmare.They're desperate to leave - but someone won't let them. A page-turning thriller p