In 'The Investigator,' Letty Davenport, previously seen in John Sandford's novels as the clever adoptive daughter of Lucas Davenport, embarks on her own perilous journey to justice. No longer satisfied with the mundane tasks of her desk job, the twenty-four-year-old Stanford graduate is called upon for her investigative prowess by a U.S. Senator. Tasked with unraveling the mystery behind crude oil thefts in Texas and a suspicious militia's potential involvement, Letty teams up with DHS investigator John Kaiser. What begins as a simple theft inquiry escalates into a deadly confrontation as they unearth a dangerous group's explosive scheme. The stakes are high, and with the clock ticking, Letty must outwit a devious enemy who threatens to cause havoc on a grand scale.