Trick of Light — David Hunt

They found her dead in the streets-a retired photojournalist with a camera. The police called it a hit-and-run accident. But the victim's former student, photographer Kay Farrow, was haunted by questions. Why was her mentor walking alone--after midnight--in the most dangerous streets of San Francisco? And stranger still, what about the disturbing images found in the woman's camera? Kay was determined to follow in her footsteps, see through her eyes, and learn the truth. But there was one problem...

Some things should never be exposed to the light.