Jane Austen meets Sherlock Holmes when a crime wave sweeps through 19th-century London's Jewish community and the adventures of wealthy-widower-turned-sleuth Ezra Melamed are recorded for posterity by Miss Rebecca Lyon, a young lady not quite at the marriageable age. In this fourth volume of the series, David Salomon, a young violinist and composer, has left the wilds of the American frontier to find fame and fortune in Regency London. But disaster strikes not long after he arrives. Someone is stealing and publishing his compositions before he can perform them and soon he is the laughingstock of the beau monde that he had hoped to conquer. With few friends and even fewer resources, he turns to Ezra Melamed for help with finding the thief. But who would wish to harm a young stranger? The deeper Mr. Melamed looks into the violinist's story the more jarring notes he finds, making The Doppelganger's Dance one of the most discomposing mysteries of his career.