The Chancellor Manuscript is a 1977 novel, by American writer Robert Ludlum, about the alleged secret files of J. Edgar Hoover and how they disappeared after his death, and how they possibly could be used to force people in high places to do the bidding of those who possessed the secrets contained therein.

In the prologue the protagonist meets an ambassador of the United States who is the subject of his thesis which is rejected.

When Hoover is assassinated by the work of the ingenious NSC official Stefan Varak, half of the files are not found.

In January 2010 director Marc Forster acquired the rights of the novel to make it into a feature film.

A sequel was planned under the title The Chancellor Letter with a 100-page manuscript being produced by an unnamed science-fiction writer but the Ludlum estate has yet to approve its publication.