In a Dark, Dark Wood Hardcover Aug 4 2015 By Ruth Ware
Nora hasn't seen her former best friend, Clare, for ten years. Not since Nora walked out of school one day and never went back. Until, out of the blue, an invitation to Clare's hen party arrives. Is this a chance for Nora to finally put her past behind her? But out in those dark, dark woods, something goes wrong. Very wrong. And Nora soon discovers that some things can't stay secret for ever.