Letty Davenport, the brilliant and tenacious adopted daughter of Lucas Davenport, takes the investigative reins in the newest thriller from #1 bestselling author John Sandford. By twenty-four, Letty Davenport has seen more action than most law enforcement professionals. Working a desk job for US Senator Christopher Colles, she’s bored and ready to quit. But when her skills catch Colles’ attention, she is offered a lifeline: real investigative work. Texas oil companies are reporting thefts of crude. Rumour has it that a sinister militia is involved. Who is selling the oil? And what are they doing with the profits? Letty is partnered with a Department of Homeland Security investigator, John Kaiser. When the case turns deadly, they know they're onto something big. The militia has an explosive plan... and the clock is ticking down. From the bestselling and unputdownable author of the Prey series, The Investigator is perfect for fans of James Patterson and Lee Child.