Blacklist — Sara Paretsky

As a favor to her most important client, V. I. agrees to check up on an empty mansion. But instead of a mysterious intruder, she discovers a dead man in the ornamental pond--a
reporter for an African-American publication whom the suburban cops are quick to dismiss as a suicide.

When the man's shattered family hires V. I. to investigate, she is sucked into a Gothic tale of sex, money, and power, leading her back to McCarthy-era blacklists and forward to some of the darker aspects of the Patriot Act. As V. I. finds herself penned in to a smaller and smaller space by an array of people trying to silence her, and before she can untangle the sordid truth, two more people will die--and V. I.'s own life will hang in the balance.