The Calculus Affair Hardcover

The Calculus Affair, the eighteenth volume in Hergé's classic Adventures of Tintin series, plunges Tintin, Snowy, and Captain Haddock into a tense Cold War-era espionage thriller. When the eccentric Professor Calculus invents a groundbreaking ultrasonic device capable of destroying objects with sound waves, he becomes the target of two rival European powers, Borduria and Syldavia, both desperate to acquire the dangerous technology. What begins with inexplicably shattering glass at Marlinspike Hall quickly escalates into a frantic international chase, as Tintin and Haddock pursue their kidnapped friend through Switzerland and into the heart of Borduria, navigating secret agents, thrilling escapes, and a series of comical mishaps involving the persistent insurance salesman Jolyon Wagg, all to rescue Calculus and prevent his invention from falling into the wrong hands.