The Calculus Affair (The Adventures of Tintin) Paperback – September 30, 1976
Regular price $6.00
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.