Ayesha Dean wants to be a detective when she grows up. But that's still a long while away. So, a trip to Istanbul with her best friends should have meant visits to ancient ruins, exploring magnificent mosques and palaces, and eating the best doner kebab in town. But when Ayesha discovers a mysterious note hinting at a hidden treasure, their relaxing holiday gets a whole lot more dangerous. An ancient artefact of untold value has been lost for years,...