Introduction In thirty years of study of Frank Lloyd Wright's designs, it has become ever more clear to this author that Wright was a genius in his treatment of light. He was apparently intrigued with its properties, with shadow and pattern created by light as it entered the home environment. Excerpted from Frank Lloyd Wright's Stained Glass: Stained Glass and Lightscreens by Thomas A. Heinz All rights reserved by the original copyright owners. Excerpts are provided for display purposes only and may not be reproduced, reprinted or distributed without the written permission of the publisher.