Eli Lowery. Book Treasure Hunters Book 1 by James Patterson.
The four kids are stranded on "The Lost" and their parents have been kidnapped.
You work as a CIA agent with my parents!? We have no choice but to trust you now.
Yes, I can take you to your father so come with me
The Kidd family find several secrete treasures on there way and find a map that led to a ship of silver and gold but was later found out as fake from Nathan Collier, their parents number one nemesis. Nathan informed the police about the Kidd children being alone but Storm saves them.
Their fathers overseer Timothy found the kids and said their father was alive and living with them. Soon after that the boat was getting followed by speed boats and the pirates asked if the kids had the key to the room and they lied and said there was no key. They captured Storm and put her through a lie test and is able to outsmart the pirates and is set free.
Twins, Storm and Timothy-We don't have it or even know if there is one.
Pirate-Where is the key!?!?!
They then find that Timothy is a CIA agent and their parents worked under him as spies. They have no choice but to go with him with trust so they can soon find there father.
The Kidd family received a email from their father and knew he was alive so they sent one back then got to see him after all the time they thought he was dead.