What makes a woman join the most secretive and dangerous unit of Special Forces? What keeps her there? How does she cope with the rigorous physical and psychological training, including ‘simulated terrorist interrogations’, the often deadly missions, the relentless pressures of a macho world, and hte sex?

One Up (the military term for someone travelling solo on a surveillance mission) is the electrifying first-person account of an exceptional young woman’s experiences of action and adventure - the first book ever written by a female member of an SAS unit.