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Stefan Klein is a physicist, essayist and science writer based in Berlin. His books have been translated into 25 langauges.

"The Secret Pulse of Time", his latest book published in English, was voted one of Library Journal's most notable science titles of the year.

"Leonardo's Legacy", his most recent book, is currently a national German best seller. Other languages are to follow this autumn, an English edtion will be released in spring 2010.