Shadow Side — Linda Castillo

Dr. Elizabeth Barnes has devoted her heart and soul to medical research...at the expense of love in her life. But now--winning an award for her latest breakthrough drug--Elizabeth is at the top of her game, and she wouldn't change a thing.

Until a detective contacts her about a recent wave of homicides.

Cases of random violence have erupted across the country--murderous acts committed by previously nonviolent people. Detective Sergeant Adam Boedecker, grieving brother to one of the suicide-murderers, has discovered that all the suspects had taken Elizabeth's new antidepressant, Valazine. First, she dismisses it as the wild accusations of a burnt-out cop. But after another mysterious death, Elizabeth realizes that this intense, driven man may be the only one who can stop the killings...and save her from the dark side of her work, her passion, her life.