Voluma:
The Red Sea Sharks, for me, is a prime example of the genius of the Tintin books.
That's my favourite book! And you're right, what a plot! I love how it starts with a just quiet trip the movie theatre, the Captain and Tintin discussing the plot like old friends... not realizing the plot they're about to encounter of their own! And then the wallet on the sidewalk... how they sit and go through the contents, and the greater mysteries are hinted at (money? photos of planes? cryptic notes??!) but nobody knows quite what it's all about. Then onto more Marlinspike... only the mystery is picking up speed now.
Them being turned away by customs, only to survive the plane crash, escaping through the desert, then then covert meetings in caves or dark houses... Tintin getting more and more pieces of the puzzle. Though the true scope and horror hasn't been revealed yet. Then it's onto a raft in the middle of the ocean, the deck of a fancy party ship, and then locked deep a freighter only to emerge and save it... and then eventually, back home again. It all flows wonderfully, and it's quite the adventure with so many great moments and quite a scary plot. One of my favourite frames ever is Tintin sticking his head out of the barrel with the REWARD sign by his head.
I think the Captain really shines in this book too. We see him being his usual humorous, hollering, whiskey self but I just love when he gets to take over a ship and is really in his element. He even seems a little more daring than usual when dealing with a certain opera singer! Tintin is in great form throughout as well. They work so well together. (And who doesn't love the beard under or over the sheet scene! "Did... did you fall out of your bunk?")
Amilah:
I adore Haddock's deus ex machina appearance in "Black Gold", and the (quite simple really and at the same time rather complicated) justification for it. It's absolutely shameless, and it makes me laugh each time.
Aha, I agree! "Forgive me Captain, I'm sorry I interupted... You were saying..." only to interrupt him again for about the third time.
And yeah, the plot of the moon books is probably second to none.