New York: St Martin's, (1986) dj. Hardcover first edition - The fourth mystery featuring Norma and Alexandra Gold Ð New York Sleuths with an old-fashioned solution to murder. As they are attending a $1000 a seat benefit opera performance, one of the principal singers is murdered in front of them and 2000 other witnesses. 227 pp. Dust jacket by Terry Fehr. ISBN: 0-3123367880.