"On the run from nefarious, nameless thugs, Sebastian and Evie must travel the world to reunite the other explorers from the Filipendulous Five if they are to put all their clues together and find Evie's grandfather before it's too late"--Provided by publisher.
Explorers ; 
Missing persons -- Juvenile fiction.
Secret societies -- Juvenile fiction.
Voyages and travels -- Juvenile fiction.