The classic graphic novel. When Tintin and Captain Haddock happen across a community of gypsies they invite them home . . . just as Bianca Castafiore, the famous opera singer, decides to visit Tintin. It's chaos at Marlinspike Hall, and then a precious emerald goes missing | The Castafiore Emerald by Hergé Hergé, Paperback | Indigo Chapters