It's 1902. London is looking forward to the new King's coronation and ignoring the threat of war from across the sea. Who has stolen the Crown Jewels from the Tower of London? How could the thief walk through walls made of stone? What further crimes lurk inside the mind of the Black Crow? Penelope Tredwell is cursed with writer's block. So when a mysterious letter arrives confessing to an impossible crime, Penelope thinks she's found the perfect plot. Sinister experiments, kidnap and treason. But what if it's all true?