As stated in the book's foreword, all the information and scenarios depicted were taken from interviews with 394 people who were involved. All that was stated in these interviews was considered on the record but the identity of the sources remained confidential. Every detail was thoroughly checked and any information that could not be confirmed by two separate accounts was left out of the book.
In 1989, a television adaptation of the book aired. It starred Lane Smith as Nixon. It was nominated for five Emmys and a Golden Globe.