Dead Midnight (2002) by Marcia Muller

New York Times bestselling author, Marcia Muller, brings you another thrilling mystery with her famous private investigator, Sharon McCone.

Sharon McCone has decided to throw herself into work so she can get past her brother's suicide, but the wrongful-death suit she is working on hits too close to home. It's a civil case in which the family of a young 'zine employee claims his suicide was the result of his company's treatment of him. In his final journal entry, Roger Nagasawa describes his fatal plunge from the San Francisco Bridge as being "swept away from sadness."

With the help of her friend, J.D. Smith, McCone investigates the InSite offices and soon learns of its publisher's less-than-professional activities. She also learns that Roger had been afraid for his life since he was a witness to computer espionage. Faced with the death of her friend, Smith, and the sudden disappearance of Roger's associate, McCone must keep one step ahead of the game and solve this mystery -- or else become the next victim.