Antiquarian Book Fair At 25 A Million Books, Ready To Read At 139 Main St. By JIM KEVLIN • Special to www.AllOTSEGO.com COOPERSTOWN – Dad Will Monie and son Willis don’t minimize challenges to the book business, but the Internet Age has also opened up opportunities. Willis Monie Books has one million volumes in its building at 139 Main St., easily available to the half-million visitors who come to Cooperstown annually, plus the 60,000 county residents. Of the total, 125,000…