When a counterfeiting ring rocks London, the trail leads to a curiosity shop and a professor offering a treatment for 'absent-minded gentlemen'; - but can Detective Kenyon get to the bottom of the clever scheme? Frank Heller was the pseudonym of Gunnar Serner, who was the first internationally famous Swedish crime writer. The son of a clergyman, after his university years he fled Sweden for the continent to avoid arrest after a financial fraud. After losing the swindled money in a casino in Monte Carlo, he tried his hand at writing novels with immediate success, and produced forty-three novels, short stories and travelogues before his death in 1947.