Black fridays - Michael Sears

Winner of the Shamus award and shortlisted for the Edgar Award for Best First Novel' After two years in federal prison, Jason Stafford is no longer welcome on Wall Street. He's putting the pieces of his life back together when one firm sees his expertise in financial crime as an asset and wants him to quietly look for irregularities in the books of one of their junior traders, whose body was just pulled from the Long Island Sound. As a single father raising an autistic five-year-old, Stafford can't refuse the lucrative offer. The job is meant to last two weeks, but soon he's caught up in more than he bargained for, facing threats and intimidation, and the bodies are piling up. Stafford must fight for his life while struggling to save his son from a different kind of danger...