<DIV><p>"Exhaustively detailed yet eminently readable, this is an important book."<I>Publishers Weekly</I>, starred review</p><p>"Cassidy does not so much exculpate Heisenberg as explain him, with a transparency that makes this biography a pleasure to read."<I>Los Angeles Times</I></p><p>"Well crafted and readable . . . [Cassidy] provides a nuanced and compelling account of Heisenberg's life."<I>The Harvard Book Review</I></p><p>In 1992, David C. Cassidy&rsquo;s groundbreaking biography of Werner Heisenberg, <I>Uncertainty</I>, was published to resounding acclaim from scholars and critics. Michael Frayn, in the <I>Playbill</I> of the Broadway production of <I>Copenhagen</I>, referred to it as one of his main sources and &ldquo;the standard work in English.&rdquo; Richard Rhodes (<I>The Making of the Atom Bomb</I>) called it &ldquo;the definitive biography of a great and tragic physicist,&rdquo; and the <I>Los Angeles Times</I> praised it as &ldquo;an important book. Cassidy has sifted the record and brilliantly detailed Heisenberg&rsquo;s actions.&rdquo; No book that has appeared since has rivaled <I>Uncertainty</I>, now out of print, for its depth and rich detail of the life, times, and science of this brilliant and controversial figure of twentieth-century physics.</p><p>Since the fall of the Soviet Union, long-suppressed information has emerged on Heisenberg&rsquo;s role in the Nazi atomic bomb project. In <I>Beyond Uncertainty</I>, Cassidy interprets this and other previously unknown material within the context of his vast research and tackles the vexing questions of a scientist&rsquo;s personal responsibility and guilt when serving an abhorrent military regime.</p><p><B>David C. Cassidy</B> is the author of <I>J. Robert Oppenheimer and the American Century</I>, <I>Einstein and Our World</I>, and <I>Uncertainty</I>.</p></DIV>