Navy veterans Brian Andrews and Jeffrey Wilson (Andrews & Wilson) are the New York Times bestselling writing team behind the Wall Street Journal, Audible, and #1 Amazon bestselling Tier One series which has been optioned for television. Brian is a nuclear engineer and Park Leadership Fellow who served as an officer on a fast-attack submarine. Jeff is a vascular surgeon and jet pilot who conducted combat operations with an East Coast-based SEAL team and worked in covert government task forces. Their other works include the Sons of Valor and Shepherds series, and they recently took over Tom Clancy's Jack Ryan series, starting with book twenty-four, Act of Defiance.