Invisible Presidency. By Louis W.Koenig. Published 1960 by Rinehart & Co., Inc. Hardcover, no dj, index, 438 pp., 8vo. Seven authoritative portraits of the confidants who have wielded behind the scenes power at the White House. They include: Alexander Hamilton, Martin Van Buren, William Loeb Jr., Col. Edward M. House, Thomas G. Corcoran, Harry Hopkins, and Sherman Adams. Condition: Ex-Libris exterior and interior markings. Book is complete, and intact with sturdy binding. Interior pages are in very good condition. Cover has sunned spine and boards.