New York: Macmillan, 1948.
First American Edition. Hardcover. Near fine in a very good dust jacket. First printing. 213 pp, in publisher's blue boards. Rubbing to spine ends and lower edges, one small stain on front free endpaper, else fine. Dust jacket is lightly dust soiled and has small chips to the spine ends. Original price ($2.50) present. A stand-alone mystery, summarized in a later publisher's description as follows: "Miss Lucy Pym, a popular English psychologist, is guest lecturer at a physical training college. The year's term is nearly over, and Miss Pym -- inquisitive and observant -- detects a furtiveness in the behavior of one student during a final exam. She prevents the girl from cheating by destroying her crib notes. But Miss Pym's cover-up of one crime precipitates another -- a fatal "accident" that only her psychological theories can prove was really murder."