We hereby promote Dorothy Sayers from the straight mystery classification, and put her into the category of novel-cum-detection-cum-psychology. First rate yarn on the erudite and discursive side, a good picture of academic life in England, and again a Peter Wimsy story, with a bit of romance accruing when he frees Harriet Vane of a murder charge, helps reinstate her in her college in Oxford, and helps her trace the culprit who is intimidating the college with obscene notes. Chance for a double sale — on fiction and on mystery tables.