The Ivory Dagger

A jilted fiancé is suspected of murder in the series that offers “some of the best examples of the British country-house murder mystery” (Alfred Hitchcock’s Mystery Magazine).
 Bill Waring went to America with a bright future ahead of him. In London he had a promising career and the love of a young beauty, Lila Dryden, and there were plans for marriage when he returned from overseas. But then a freak train accident puts their happiness on hold. Bill spends a month in the hospital, and when he finally makes it back to London, there is a still bigger shock awaiting him. Under pressure from a domineering aunt, Lila has become engaged to another. She and her new fiancé—middle-aged, charmless, and rich—are in the country for the weekend. Bill follows, determined to win back Lila’s heart. But when her new betrothed is stabbed to death, blame falls squarely on Bill, and only the brilliant, demure detective Maud Silver can clear his name.