Mary Pinchot Meyer was more than a bedmate of John F. Kennedy. She was his sole female adviser, spending mornings in the Oval Office, and, at night, discussing issues. After the assassination, Mary didn’t believe Lee Harvey Oswald acted alone, and she shared that view in Washington’s most elite circles. On October 10, 1964, a man shot her in the head and the heart. That night, Mary's best friend called her sister. “Mary had a diary,” she said. “Get it.” The diary was filled with sketches, notes for paintings --- and 10 pages about an affair with an unnamed lover. Her sister burned it. In JFK AND MARY MEYER, Jesse Kornbluth recreates the diary Mary might have written. Working from a timeline of Kennedy’s presidency and every documented account of their public relationship, he has written a high-octane thriller that tracks this secret, doomed romance --- and invites readers to solve Mary’s murder.