Please note that the content of this book mainly consists of articles available from Wikipedia or other free online sources. Guido Beck (August 29, 1903 - October 21, 1988) was a physicist born in the city of Reichenberg, which was then part of Austria-Hungary and is now Liberec in the Czech Republic. He studied physics in Vienna and earned his doctorate in 1925 under Hans Thirring. In 1928, he worked in Leipzig as an assistant to Werner Heisenberg. A combination of the tense political climate in Europe during the 1930s, his own unrest, and the Nazi persecutions in Germany made Beck, who was born Jewish, a traveler during those years. Until 1935, he worked in Cambridge with Ernest Rutherford, in Copenhagen, Prague, the United States, and Japan.