James Patterson 
Treasure Hunters: Quest for the City of Gold 
(Treasure Hunters 5)

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!