Volume 6 includes #15-#17 - "Land of black gold", "Destination moon", "Explorers on the moon"
Land of Black Gold
The world is on the brink of an oil crisis. In the Middle East the evil Sheik Bab El Ehr tries to overthrow Sheik Ben Kalish Ezab, so Tintin heads to the Middle East to save the day. Throwing a monkey wrench into the proceedings, in addition to the omnipresent evil agents and hapless Thompson brothers, is Abdullah, son of Sheik ben Kalish Ezab...
"Destination Moon" gives a detailed account on the preparation and the launching of the expedition to the Moon from the Sprodj Atomic Research Center in Syldavaia using the rocket designed by Professor Calculus. This is the first half of the tale, which is continued in "Explorers on the Moon."
Explorers on the moon
"Explorers on the Moon" picks up right where "Destination Moon" left off, with Tintin and his friends unconscious in a spaceship hurtling towards the moon. Will our hero wake up in time to save everyone from death? Also, there is clearly a spy on board the rocket designed by Professor Calculus that took off from the Sprodj Atomic Research Center in Syldavaia, the troubles of Tintin and his friends are far from over.