books.google.de - Time Machines takes you on an exhilarating journey through the intriguing theories of scientists and the far-flung imaginations of writers. It explores the ideas of time travel from the first account in English literature to the latest theories of physicists such as Kip Thorne and Igor Novikov. This...http://books.google.de/books/about/Time_Machines.html?hl=de&id=39KQY1FnSfkC&utm_source=gb-gplus-shareTime Machines
