Dear Diary... Bess and I were thrilled to bump into our old buddy Maggie Rogers, a promising young dancer who is in River Heights to perform a lead role in Sleeping Beauty.   But someone''s out to get Maggie. First, her phone was tampered with, making her late for rehearsal. Then, her face was violently scratched out on the show''s posters, and her dressing room was trashed beyond belief.   I''m determined to find out who''s trying to sabotage my friend''s career. But I have to crack this case before the big show - or it could wind up being Maggie''s last dance!