What is the series after 39 clues?

The 39 Clues is a series of adventure books, combining reading, online gaming, and card collecting. Published by Scholastic, the main part of the series consists of ten books about the adventures of siblings Amy and Dan Cahill trying to thwart the other Cahills to get the Clues, which will make them "the most powerful and influencial person(s) on the planet".

The 39 Clues is a website where you find clues from books and cards to win prizes by the way try entering this card 27h2pghwx2 then pass it on. Romeo its not my real name