The late Edwin B. Coddington devoted his career to studying the Civil War and particularly the Battle of Gettysburg, and he produced what may stand as the landmark work on that controversial military action, The Gettysburg Campaign: A Study in Command. A paper edition totaling 866 pages has now been published by Scribner's [$17.95]. First published in 1963, Harriette Simpson Arnow's Flowering of the Cumberland described how the settlers of what is now Middle Tennessee triumphed over a wilderness still teeming with Indians and built a culture and society that would in time influence much of the American Southwest. A new edition of this book is available from Kentucky [$28 cloth, $13 paper]. Colonial Williamsburg has published a revised edition of Marcus Whiffen's The Eighteenth-Century Houses of Williamsburg, a comprehensive study and pictorial survey of the stately homes, taverns, and shops, many of which still stand in Williamsburg today [$19.95 cloth]. Harper Colophon Books has reprinted the 20th-century chapter of Howard Zinn's A People's History of the United States under the title The Twentieth Century: A People's History, The new edition includes a chapter on the Carter and Reagan presidencies [$5.95 paper]. With this country passing through what some have called "the graying of America," retirement looms large in the public consciousness, and William Graebner's A History of Retirement: The Meaning and Function of an American . Institution, 1885—1978 offers a detailed description of a fairly recent institution. A paper edition has been published by Yale [$9.95]. A recent Beacon Press paperback is Mark D. Morrison-Reed's Black Pioneers in a White Denomination, an account of how blacks experience religion in America's white churches, and it includes an introduction by Atlanta Mayor Andrew Young [$9.95]. Vintage Books has reprinted Theodore Draper's collection of essays, Present History: On Nuclear war, Détente, and Other Controversies [$9.95], Two new volumes in McGraw-Hill Paperbacks are Fran Worden Henry's Toughing It Out at Harvard: The Making of a Woman MBA [$6.95] and Walter E. Williams' The State Against Blacks [also $6.95]. New Touchstone Books include George F. Will's Statecraft As SoulCraft: What Government Does [$5.95], the National Research Council's The Race for the New Frontier: International Competition in Advanced Technology [$9.95], and a revised and updated edition of Daniel Ford's The Cult of the Atom: The Secret Papers of the Atomic Energy Commission [$6.95].