Bradley Cooper is currently in talks to star in a Warner Bros thriller Dark Invasion.
The studio has signed a six-figure deal to acquire the movie rights to the upcoming non-fiction book by Howard Blum, reports Deadline.
Blum's book, which is set in 1915, tells the story of the clandestine war waged by the German Secret Service against the US, then still neutral in the ongoing First World War.
Cooper would play NYPD Captain Tom Tunney, who led the task force in charge of bringing the spies to justice.
The book Dark Invasion is set to be published by Crown/Random on September 11, 2013.