'Why do you think it is. . . ', I asked Dr. Cook. . . 'that brain surgery, above all else-even rocket science-gets singled out as the most challenging of human feats, the one demanding the utmost of human intelligence?' [Dr. Cook answered,] 'No margin for error. '
Before she realized he was next to her, he had placed his hands over hers on the countertop, then hooped his fingers through hers. Gretel looked up at him, so startled she might as well have been shot. 'I just wanted to wake you up', he said. Which is exactly what he did. One look at him and her heart was racing. One look, and whatever had been before was all over.