A dead man in a locked room. A machine that should not be moving. And a secret hidden inside a wooden star.
London, January 1893. When Clara Hale arrives at 221B Baker Street with frost on her cloak and fear in her eyes, she brings Sherlock Holmes a puzzle unlike any he has encountered. Her uncle—a reclusive collector of rare scientific instruments—has been found dead beside a magnificent sixteenth-century astrarium, a mechanical model of the heavens. The room was locked from within. The machine was running. And one of its tiny planets was turning the wrong way.
A richly atmospheric locked-room mystery in the tradition of Arthur Conan Doyle—where every clue is earned, every deduction follows, and the game is very much afoot.