Death Beneath the Streets — Randolph Mase

In a single week, three people are killed in the subway system beneath the streets of New York City, but the police call the deaths unrelated, and term two of them as accidental. Follow Private Investigator Matthew Hogan as he attacks the mystery as a puzzle, listing the suspects-one of whom is a former lover of his-and becoming involved in all three deaths, and more, in the process.