Bestselling novelist Dean Koontz is back with a fierce new main character named Jane Hawk. But what’s really scary in “The Silent Corner” is Mr. Koontz’s chilling villain, a scientist who uses nano brain implants for a sinister purpose. Although this may sound like science fiction, it’s not really. Consider the fact that real billionaire entrepreneur, Elon Musk, recently launched a company to develop brain-computer interfaces that may soon upload and download thoughts.