Maybe even all of Germany. Buchhandlung zum Wetzstein is located just off of Augustinerplatz. Upon entering, you will be greeted by the friendly and helpful staff, and then you will be completely absorbed by beautifully displayed books, facsimiles, signed and early editions, small sculptures, paintings, photographs, and many rare finds. If you are looking for something specific and have a day or two, they will order it for you. My philosophy grad student husband imagines heaven will be like this. The only down-side for many travelers is that nearly everything they carry is in German.