The book’s first #1 bestseller list: in the Amazon.com Wind Power section. by William Kamkwamba | Sep 2, 2009 | General This is neat. Today the book went on Amazon.com from #198,000 or so to #11,590 on the main list in just one day, due in large part to being selected as one of their Best Books of the Month. Almost as exciting: the book is #1 in the Wind Power list.