Andrew Child is the author of nine thrillers written under the name Andrew Grant. He is the younger brother of Lee Child. Born in Birmingham, he lives in Wyoming with his wife, the novelist Tasha Alexander.

Heather Graham is the New York Times and USA Today bestselling author of more than one hundred novels and novellas, including Phantom Evil, Ghost Walk, and Heart of Evil.

A recipient of the RWA's Lifetime Achievement Award, and the Thriller Writers' Silver Bullet, she has been honored with awards from Georgia Romance Writers, Affaire de Coeur, RT Book Reviews, and more.

John Gilstrap is the New York Times bestselling author of the Jonathan Grave thriller series and other fiction and nonfiction. His novel Against All Enemies won the award for best paperback original of 2015 given by the International Thriller Writers. His books have been translated into more than twenty languages. An explosives safety expert and former firefighter, he holds a master's degree from the University of Southern California and a bachelor's degree from the College of William and Mary in Virginia. He lives in Fairfax, Virginia.

Charles and Caroline Todd are a mother-and-son writing team who live on the east coast of the United States.

Together, they have written nearly thirty mysteries, including the Ian Rutledge and Bess Crawford series.