" I choose not to think about these images,” I muttered. “I choose to think about . . .” And then I stopped. What? What? None of Barry’s tutorials had focused on what happy images to choose when you were being held prisoner by a murderer. Was I supposed to think about my mum? About Judah? About everything I loved and held dear and was about to lose? “Insert happy image here, you little fucker,” I whispered, but the place I was inserting it probably wasn’t the one Barry had in mind. "

― Ruth Ware , The Woman in Cabin 10