La señorita Pym dispone

Even Miss Pym—lecturer at an English woman's college—agreed that final exam week was a rather grisly time at school, with ordinarily pretty girls poring red-eyed over heavy tomes, and rising at 5:00 A.M. but murder? Miss Pym was a warm-hearted, blithe little lady who read thirty-seven books on psychology, disagreed with them all, and wrote pages and pages of rebuttal. To her amazement, she became a "best-seller." Then Leys College, where she was a guest lecturer, became the scene of a peculiar and fatal "accident," which Miss Pym suspected was a planned crime. Putting her psychological theories into practice, Miss Pym turned up some surprising conclusions...