United 93 and Green Zone director Paul Greengrass is tipped to direct a film adaptation of Morton Storm's al-Qaeda memoir, Agent Storm: My Life Inside al-Qaeda.
Storm is a Danish citizen who joined al-Qaeda, before leaving the organisation and becoming an MI5 and CIA informant.
The Hollywood Reporter and Deadline both say Greengrass is lined up to direct. Storm's recently-published memoir explores his discovery of Islam and his move to the Middle East to join al-Qaeda.
However, the group’s increasing violence drove him to defect to intelligence agencies in the UK, Denmark and the US.
Greengrass has previously engaged with the subject of terrorism in his films. United 93 depicted the drama on board the hijacked plane that crashed in Pennsylvania on September 11, 2001, and Green Zone, which starred Matt Damon, was set in Baghdad during the Iraq war.