14-year-old Amy and her younger brother Dan, after the death of their beloved grandmother Grace Cahill, learn that their family is one of the most powerful in the world. The grandmother left a will that said: either a million dollars and a comfortable life, or the search for the mysterious thirty-nine keys, which will bring power and incredible strength to the owners. Amy and Dan decided to fight the other heirs, but they had no idea how dangerous this search would be. With each new adventure, the mysteries become more complex and the journeys become more risky. Crowded Beijing, wild Africa - who knows where else the mystical keys may lead the Cahills... The book includes the 7th and 8th novels from the inter-author series “39 Keys”