The Calculus Affair

Join Tintin and Snowy—the world's greatest adventurers—as they solve thrilling mysteries around the world. The classic graphic novel. Tintin and Captain Haddock peek in Professor Calculus' laboratory to find a sonic device and a very mysterious-and violent. -stranger. Realizing that Calculus' life is in danger, Tintin and the Captain rush to warn him before it's too late.