Robert Ludlum's The Bourne Imperative (Bourne 10)

When Jason Bourne pulls a drowning man from a lake, he discovers that the man is not only freezing - but bleeding profusely from a gun-shot wound. He wakes as an amnesiac, with no memory of who he is or why he was shot - and Bourne is eerily reminded of his own past. Meanwhile, Mossad agent Rebekah is so determined to find this man that she's gone off the grid, cut her ties to her agency, and risks a summary execution if caught by her former colleagues. Back in the U.S., Treadstone

When Jason Bourne pulls a drowning man from a lake, he discovers that the man is not only freezing - but bleeding profusely from a gun-shot wound. He wakes as an amnesiac, with no memory of who he is or why he was shot - and Bourne is eerily reminded of his own past.