The Link deals with the strange case of Sir Charles Grenville, recorded by one Michael Lawless, as likeable an Englishman as the author has yet created. He was in the saloon of The Moon at Samsford on the evening when Sir Charles' body was brought in by a villager. Shot through the head - obviously murdered. Police investigations reveal two probable suspects with weak alibis: Lawless himself and Lady Grenville, with whom Lawless is known to be in love. Then an important discovery turns the attention of the police to Dinwater, the landlord of The Moon. More discoveries, more suspicions only serve to make the problem more baffling until Colonel Anthony Gethryn takes up the case and unveils one of the most ingeniously constructed crimes in detective fiction.

First published in 1930.