Death in a Delphi seminar

In this detective novel set in a small, intense seminar, eight students study what their professor regards as the central mystery of human nature: the uniqueness of the individual. One morning a woman student who has been fighting this idea and disrupting the seminar keels over, poisoned. The detective who takes charge is himself a writer who finds this tight little world of academic criticism and theory fascinating, baffling, yet somehow sympathetic. Together he and the professor explore the minds and writings of the people in the seminar in order to track the murderer, then another body is found, pointing them in a different direction.