Sequels
After Ludlum's death, Eric Van Lustbader continued the story of Jason Bourne in a sequel titled The Bourne Legacy. He has also written the fifth, sixth, seventh, eighth, ninth and tenth novels in the series entitled The Bourne Betrayal, The Bourne Sanction, The Bourne Deception, The Bourne Objective, The Bourne Dominion, and The Bourne Imperative.
Read more about this topic: The Bourne Ultimatum (novel)