United States. Central Intelligence Agency

Ali Soufan investigated terrorism cases and opposed the CIA's use of torture following the Sept. 11 terror attacks. After a legal battle, the redacted material in his 2011 memoir, Black Banners, has been restored.

In a new book, author Scott Anderson chronicles the formative years of America's spy agency by focusing on four soldiers who became intelligence agents after World War II.

Author David Rohde refutes Trump's claims about a "deep state" — and argues that the president is the one creating a parallel shadow government filled with like-minded loyalists.