"The House on Vesper Sands is a delicious book. Somehow it manages to do a hundred marvelous things at once: Funny, eerie, tender, haunting and unsettling, smokily atmospheric and fantastically enjoyable, it's a nineteenth-century supernatural procedural mystery that is also an impassioned meditation on love and duty, loss, suffering, power and injustice. I absolutely loved it." --Helen MacdonaldWith all the wit of a Jane Austen novel, and a case as beguiling as any in Sherlock Holmes' casebook, Paraic O'Donnell introduces a detective duo for the ages, and slowly unlocks the secrets of a startling Victorian mystery.