Shadow of the Hangman (Bow Street Rivals, 1)

In this first instalment of the Bow Street Rivals series a riot breaks out in Dartmoor prison, enabling some American inmates to escape. The twin detectives Peter and Paul Skillen catch wind of a projected assassination but the target is unknown. Trouble ensues when a woman from the Home Office vanishes; a mysterious lady turns up at the archery shooting gallery; and Paul’s gambling addiction worsens . . .

Edward Marston has written over a hundred books across many series. They range from the era of the Domesday Book to the Home Front during WWI, via Elizabethan theatre and the Regency period. He is best known for the hugely successful Railway Detective series set during Queen Victoria's reign.