Andreas Wiemer (born: 1971) works as a business economist in Frankfurt, Germany. He started collecting autographs of famous personalities as a teenager in 1985. During the last ten years, Andreas has specialized in the autographs of the U.S. Presidents and First Ladies. His large reference library includes all the standard works with more than 80 books on the subject. He is a member of all the major autograph organizations. Andreas is the author of several books, published articles, autograph studies and is the expert on U.S. Presidents for www.isitreal.com. His homepage www.aw-autographen.com is the only website specializing exclusively in United States presidential autographs. Regarding authenticity his slogan has always been: "Think inversely". Before you purchase an autograph you should think along the lines that it is not genuine, than do your research hoping to prove otherwise.