Vol 7 includes #18-#20: "The Calculus Affair", "The Red Sea Sharks", "Tintin in Tibet"
The Calculus Affair
''No more travels or adventure; no more careering all round the world. I've had enough of it!'' says Captain Haddock. But danger threatens; unscrupulous Bordurians kidnap Professor Calculus, and Tintin, Snowy, and the Captain are soon on the trail again. It is no easy task to rescue the Professor and save his fantastic invention. Spies are everywhere, and Calculus lies deep in the fortress of Bakhine. But the Bordurians have Tintin to deal with...
The Red Sea Sharks
When he hears that the Emir Ben Kalish has been deposed by rebels, Tintin in quickly on his way to Khemed to help his old friend. But behind the scenes is that ruthless international gangster and slave trader, the so-called Marquis di Gorgonzola. The Marquis will stop at nothing to to protect his sinister interests. Tintin, Snowy and Captain Haddock may escape from the dangers of the desert, but far deadlier perils await them in the Red Sea.
Tintin in Tibet
High in the Himalayas lies the wreckage of an aircraft -- no sign of survivors in the frozen snow. But Tintin, reading the news of the crash refuses to believe that his Chinese friend Chang is dead. To Tibet he goes, with Snowy and Captain Haddock, to search for Chang.
The dangers of the mountains are great, but there is another enemy -- the yeti, the Abominable Snowman -- feared by Sherpas and monks alike. On the roof of the world Tintin encounters this strange creature, and unravels the mystery of Changs fate.