The mini-muffins, chocolate-chip cookies, bottles of water and a carafe of coffee still waited for takers Sunday afternoon, but the line outside The Happy Bookseller was long gone. In a little more than an hour after doors opened at 1 p.m., about 200 people — mostly women in their 40s — coursed through the store, all to pick up Hillary Rodham Clinton’s new book, “Living History.” The $28 purchase also buys a numbered place in line for Clinton’s book-signing between 2:30 and 4 p.m. today. It was fewer than the 500 store owner Andy Graves had estimated last week. “I...