The assassination of Abraham Lincoln set off a hysterical burst of international conspiracy theories, with all eyes turning first to Canada and then, as evidence mounted, to the Catholic Church and Rome.

From Max Byrd comes The Sixth Conspirator, a true story about a confidential mission to track down and capture any Europeans (and fugitive Confederates) who may have aided John Wilkes Booth. Drawn from State Department archives and personal letters and diaries.

Max Byrd is the author of bestselling historical novels about Ulysses Grant, Thomas Jefferson, and Andrew Jackson, and is the winner of the Shamus Award for his mystery novel California Thriller. Other widely reviewed novels include Shooting the Sun and The Paris Deadline. Byrd’s earlier novels, The Wall Street Journal says, “vaulted him into the first rank of American historical novelists.