Einstein, Volume 4, The Swiss Years: Writings, 1912-1914. Editors: Martin J. Klein et al. , 1995. Volume 5 - Correspondence 1902-1914 Includes more than five hundred previously unpublished letters to and from Einstein in his early adulthood, from his first employment at the Swiss patent office in 1902 through his appointment to the Prussian Academy of Sciences in 1914. Correspondents included Max von Laue, Paul Ehrenfest, Alfred Kleiner, Fritz Haber, Walther Nernst, etc. The Collected Papers of Albert Einstein, Volume 5, The Swiss Years: Correspondence, 1902-1914. Editors: Martin J. Klein et al. , 1993. The Berlin years: 1914-1929 Volume 6 - Writings 1914-1917 Includes papers describing Einstein's only experimental physics investigation, a study of André-Marie Ampère's molecular current theory of electromagnetism with Wander Johannes de Haas; etc. The Collected Papers of Albert Einstein, Volume 6, The Berlin Years: Writings, 1914-1917. Editors: A. J. Kox et al. , 1996. Volume 7 - Writings 1918-1921 The Collected Papers of Albert Einstein, Volume 7, The Berlin Years: Writings, 1918-1921. Editors: Michel Janssen et al. , 2002. Volume 8 - Correspondence 1914-1918 The Collected Papers of Albert Einstein, Volume 8, The Berlin Years: Correspondence, 1914-1918. Editors: R. Schulmann et al. In two volumes. , 1997. Volume 9 - Correspondence January 1919-April 1920 The Collected Papers of Albert Einstein, Volume 9, The Berlin Years: Correspondence, January 1919 - April 1920. Editors: Diana Kormos-Buchwald et al. , 2004. Volume 10 - Correspondence May–December 1920, Supplementary Correspondence 1909-1920 The Collected Papers of Albert Einstein, Volume 10, The Berlin Years: Correspondence, May–December 1920, and Supplementary Correspondence, 1909-1920. Editors: Diana Kormos-Buchwald et al. , 2006. Volume 11 - Cumulative Index, Bibliography, List of Correspondence, Chronology, and Errata to Volumes 1 - 10 The Collected Papers of Albert Einstein, Volume 11, Cumulative Index, Bibliography, List of Correspondence, Chronology, and Errata to Volumes 1 - 10. Editors: Diana Kormos-Buchwald et al. , 2009. Volume 12 - The Berlin Years: Correspondence, January - December 1921 The Collected Papers of Albert Einstein, Volume 12, The Berlin Years: Correspondence, January - December 1921. Editors: Diana Kormos-Buchwald et al. , 2009. Volume 13 - The Berlin Years: Writings & Correspondence, January 1922 - March 1923 The Collected Papers of Albert Einstein, Volume 13, The Berlin Years: Writings & Correspondence, January 1922 - March 1923. Editors: Diana Kormos-Buchwald et al. , 2012. Volume 14 - The Berlin Years: Writings & Correspondence, April 1923 - May 1925