Viaduct Murder — Ronald A. Knox

When four friends stumble across the body of a fellow club member during a game of golf they suspect murder. The police aren't so sure, and when it looks as though the official verdict will be suicide the men are outraged. Convinced that there had been 'dirty work' and that 'the police aren't very good at following up clues', they undertake their own investigation.

A classic Golden Age whodunit that involves the reader in a charming game of detection as the protagonists use Sherlockian methods to unravel the mystery.