Fox News host Bill O'Reilly has signed on to write two more books, including a presidential biography.
Publisher Henry Holt and Co. announced O'Reilly's plans Monday. It says the focus of the presidential biography will be revealed later. Details of the other book haven't been released.
O'Reilly also has a memoir called "Bolder and Fresher" that's still in production.
The best-selling author's first work of history, "Killing Lincoln," came out this fall. It topped The New York Times nonfiction hardcover list and has sold nearly 1 million copies.
O'Reilly's previous releases include "Pinheads and Patriots," ''Culture Warrior" and the memoir "A Bold Fresh Piece of Humanity."
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