Never underestimate a librarian. Comfortably padded and in her middle years, Shona McMonagle may look bookish and harmless, but her education at the Marcia Blaine School for Girls has left her with a deadly expertise in everything from martial arts to quantum physics. It has also left her with a bone-deep loathing for The Prime of Miss Jean Brodie, that scurrilous novel that spread scandalous untruths about the finest educational institution in Edinburgh....