Into the Gauntlet (the 39 Clues, Book 10)

Description:

The explosive finale! Throughout the hunt for the 39 Clues, Amy and Dan Cahill have uncovered history's greatest mysteries and their family's deadliest secrets. But are they ready to face the truth about the Cahills and the key to their unmatched power? After a whirlwind race that's taken them across five continents, Amy and Dan face the most the difficult challenge yet-a task no Cahill dared to imagine. When faced with a choice that could change the future of the world, can two kids succeed where 500 years worth of famous ancestors failed?

subjects: Code and cipher stories,  Families,  Brothers and sisters,  Juvenile fiction,  Amy Cahill (Fictitious character),  Dan Cahill (Fictitious character),  Fiction,  Children's fiction,  Mystery and detective stories,  Family, fiction,  Orphans,  Ciphers,  Siblings,  Family,  Secrets,  Adventure fiction,  Mystery fiction,  JUVENILE FICTION / Family / General,  History,  Family secrets,  Treasure hunt (Game),  Cryptography,  Genealogy,  Hermanos,  Secretas de la familia,  Ficción juvenil,  Huérfanos,  Brothers and sisters, fiction,  Orphans, fiction,  Child and youth fiction