Which book is this?

The Key Man (2021) · Simon Clark, Will Louch The Key Man (unknown) The key man (1926) · Valentine Williams The key man (1952) · Clarence Budington Kelland Find the key man (1974) · Hal Higdon Albert the Key Man (2018) · Ilana Danneman

Raffles and the Key Man (2011) · Barry Perowne

Murder and the Key Man (2016) · Clarence Budington Kelland

The key-man in cancer control (1928) · American Cancer Society

Summary of Simon Clark & Will Louch's the Key Man (2021)