Four treasure-hunting siblings are back, and this time they’re headed deep into the jungle on their most glittering adventure yet! The siblings discover a map leading to a legendary lost Incan city made entirely of gold. But the road to riches is paved with extreme danger. When their map is stolen and their brilliant sister, who holds the key to the entire mission, is kidnapped by ruthless rivals, the remaining siblings must rely on her photographic memory to navigate the treacherous, snake-infested wilderness. Can they find the ancient city, save their sister, and protect the gold before their enemies beat them to it? Packed with high-stakes action, hilarious sibling banter, and beautiful illustrations, this is a fast-paced survival story young readers won’t be able to put down.