Brian Andrews is a US Navy veteran who served as an officer on a 688-class fast attack submarine in the Pacific. He is a Park Leadership Fellow and holds a master's degree from Cornell University. He is the author of The Calypso Directive, the first book in the Think Tank series of thrillers. Born and raised in the Midwest, Andrews lives in Tornado Alley with his wife and three daughters. Jeffrey Wilson has worked as an actor, firefighter, paramedic, jet pilot, and diving instructor, as well as a vascular and trauma surgeon. He served in the US Navy for fourteen years and made multiple deployments as a combat surgeon. He is the author of three award-winning supernatural thrillers: The Traiteur's Ring, The Donors, and Fade to Black. He and his wife, Wendy, live in Southwest Florida with their four children.