From the Publisher:
Despite two husbands being dead and a daughter marrying the wrong man, no one believed Sybil Foster was the type to commit suicide, especially Superintenent Roderick Alleyn. For the field was ripe with unfortunate engagements - one of them a very grave mistake...
Ngaio Marsh: Grave Mistake. St. Martin's Press; ISBN: 0312972970 (February, 2000); 256 p., $5.99