Which of these book titles best describes the United States v. Nixon case and its significance?

Not Above the Law – Nixon's illegal actions resulted in a Supreme Court ruling requiring sharing of the private tapes.
Stealing the Presidency – The Supreme Court ruled President Nixon must appear in court, but he resigned from his office before the hearings began.
Executive Privileges – Nixon proved that a president has the right to keep communications with advisors private.
The People Speak – The Supreme Court ruled that conversations could remain private, but Nixon was impeached anyway.

Stealing the Presidency – The Supreme Court ruled President Nixon must appear in court, but he resigned from his office before the hearings began.

Not sure of the Court ruling to appear, but definitely sure of his resignation.