The Bourne Identity , Robert Ludlum

He is a man with no past – and he may not have a future.  All he knows is that he was found floating in the sea.  Nearly dead.  Implanted beneath his skin is a frame of microfilm.  And on the film is a number which leads to a bank account in Zurich, the name Jason Bourne. . . and a fortune. 

Suddenly Bourne is the target of assassins, and at the heart of a deadly puzzle.  He’s fighting for survival as he tries to uncover the layers of his buried past.  No one can help him – except one woman.  And now both their lives are in danger.