The memoir will by published in the UK this fall by the Penguin Random House imprint Chatto & Windus.
She was accused of leading a foreign-linked hostile data pipe.
Zaghari-Ratcliffe has consistently denied the allegations made against her.
L-R: Narges Rashidi and Joseph Fiennes, Nazanin Zaghari-Ratcliffe and Richard RatcliffeGetty Images/Curtis Brown
She was to spend the next six terrifying years held hostage in prison.
Graham and Goold have been in Germany during the Euros tournament on a fact-finding mission for the TV show.
Nazanin Zaghari-Ratcliffe and her husband Richard Ratcliffe in 2022 (Getty Images)Chris J Ratcliffe/Getty Images
