Ketil Thorgersen: " The book has no author. Who wrote it? Content in books with no author usually comes from Wikipedia. If you own the book please check the book's bibliographic page, introduction and the end of each chapter for further details. For example, you can click the hyperlink at the end of any chapter and then click the history tab to see a list of each chapter's contributors. Otherwise, please click the Details link on the search results page for details. "