 Harlequin is the first novel in The Grail Quest series by an English author who  is best known for his novels about what Napoleonic Wars rifleman?
Harlequin (novel): Harlequin (in US "The Archer's Tale") is the first novel in The Grail Quest series by Bernard Cornwell. Bernard Cornwell: Bernard Cornwell, OBE (born 23 February 1944) is an English author of historical novels and a history of the Waterloo Campaign. Bernard Cornwell:  He is best known for his novels about Napoleonic Wars rifleman Richard Sharpe.
Richard Sharpe