Alexis Sturmgarten knows exactly what the Devil looks like in San Francisco. He usually has stock options.

Once the city’s best private investigator, Alex now spends her days selling books and crystals, reading tarot, and keeping other people’s problems at arm’s length. Then an old lawyer friend comes begging for her help with a client accused of...

Alexis Sturmgarten should have known better than to ignore the Tower.

A once-in-a-century summer storm is bearing down on San Francisco when a promising date takes Alex inside the city’s most infamous luxury high-rise. Then the lights go out.

Minutes later, a man is dead across the hall.

With the elevators down, the police buried under storm calls,...