Merry Christmas! Happy Holidays!
The Tintin movie is coming out soon, and, in preparation, Kenna is reading all of the Tintin comic books. She enjoys Tintin and the Picaros, while my personal favorite is Red Rackham's Treasure.
The fumbling Thompson twins are enjoyable, and one may think that Professor Calculus's mishearing is a one-time joke, but really, the humor is fairly constant whenever you read it. Kenna likes Captain Haddock and his insults.
If you've never read Tintin books, I'd recommend Tintin in America and Tintin and the Broken Ear. The earlier ones help to establish the characters. There are few ongoing adventures in the collection of books, but I advise you to read them in order.