Lawrence Wright, who wrote the excellent and definitive account of  the September 11 attacks, THE LOOMING TOWER, has written a new expose  about Scientology, which was excerpted recently in The New Yorker.  It's worth reading. In this week's issue, there are two letters in response to Wright's piece.  Here they are: Lawrence Wright, in his Profile of Paul Haggis  and his thirty-five-year relation…