Andrew Baumann isn't a professional soap maker. Actually, he's a history teacher at Whitnall High School who's just really into the art of old-fashioned wet shaving. And, just like all hobbyists think to themselves eventually, Baumann wondered last January if he could get into the business, too. Recently, Baumann, who is an avid fan of classic books, launched The Shave Library, a line of men's shaving soaps on Etsy.