Title: The Black Circle (The 39 Clues, #5)
Subjects: nyt:series_books=2010-05-01, New York Times bestseller, Juvenile fiction, Adventure and adventurers, Scavenger hunts, Mystery fiction, Brothers and sisters, Inheritance and succession, Orphans, Wills, Fiction, Children's stories, Adventure fiction, Adventure stories, Siblings, Children's fiction, Adventure and adventurers, fiction, Mystery and detective stories, Code and cipher stories, Detective and mystery stories, American Code and cipher stories, Family secrets, Ciphers, Frères et sœurs, Romans, nouvelles, etc. pour la jeunesse, Récits de cryptographie