Oaths and Miracles — Nancy Kress

Judy O'Brien Kozinski has no idea what she'll find as she investigates the death of her husband. A genetic scientist, he was slain for his refusal to work for a biotech company of dubious intentions controlled by the mob. As she fights for answers in the offices of the FBI, witnesses the mass execution of a religious cult, and uncovers the devious motive of the biotech firm--producing customized viruses that could be spread like a cold--she realizes the power and potential of herself as an individual. Her transformation, from unhappy and insecure widow to confident, sleek sleuth is almost as Herculean as her success at exposing this global threat.