Not content with the four mystery series he’s currently keeping afloat, Ralph McInerny offers a retrospective of four novellas and three short stories about Sister Mary Teresa Dempsey, of the Order of Mary and Martha (“the M & M’s”), first published between 1988 and 1997 under the female pseudonym vainly intended to keep his name from appearing so often before the public. Though the problems may be earthy—a suspicious hit-and-run accident, a planned spouse-killing, a terrorist threatening the cop who put her away—the detection is as well-bred as you’d expect from the creator of Father Dowling (Triple Pursuit, p. 219, etc.).