Edward Marston 
The Counterfeit Crank 

Nicholas Bracewell befriends a young beggar who is trying to eke out a living as a counterfeit crank, pretending to have spectacular epileptic fits in order to get money from gullible bystanders. When the beggar is murdered inside Bridewell, Nicholas has to pose as a beggar himself in order to get inside the notorious institution so that he can solve the crime. Counterfeiting of all kinds is exposed.

About the author

Edward Marston has written well over a hundred books, including some non-fiction. He is best known for his hugely successful Railway Detective series and he also writes the Bow Street Rivals series featuring twin detectives set during the Regency; the Home Front Detective novels set during the First World War; and the Ocean Liner mysteries.