Treasure Hunters (Quest for the City of Gold) - James Patterson

The Kidd family discovers an ancient map to the lost Incan City of Paititi. But when the map is stolen, the Kidds have to rely on Storm's picture-perfect memory to navigate the dangerous Amazon jungle – until she's kidnapped! To save Storm, the Kidds must locate the fabled city ... before the bad guys find it first. The race is on!