By Detlef Mertins. Phaidon Press, March 2014, 542 pages, $150. The Enduring Legacy of a Modern Master The newest and—according to its publisher, Phaidon—“most definitive” monograph on Ludwig Mies van der Rohe weighs 6½ pounds, has 542 pages, and 600 illustrations, and, at a size of 12 by 9 3/8 inches, will fit only horizontally into most bookshelves. It is a monument to the architect's enduring legacy and appeal, but also a fitting tribute to its author Detlef Mertins, eminent Mies scholar, former chair and professor at the Department of Architecture at the University of Pennsylvania, who sadly passed away