Saturday, July 30. Much publicity and crowds of theatregoers and curious in London for the opening of J.K. Rowling’s play Harry Potter and the Cursed Child. The following day the rehearsal script was published internationally as an e-book and in a lavish hardback edition. Rave reviews for the play, huge sales for the script. First reviews of the play suggest it could easily run past 2018, when it is scheduled for transfer to Broadway. The play script, the mundane language and brief stage directions give only a slight indication of the miracles and magic that critics and audiences are reporting—…