The Tintin series is one that I have read, and reread since I was a child. Hergé, the author (and artist) produced work over a period of more than fifty years. He's a fascinating figure--not least because, in his later years, he was not at all shy of making brutal assessments of the quality of some of his earlier works.
Tintin and the Picaros
Part of the interest in reading Tintin is thinking about how Hergé's politics changed over time--and, frankly, his changing politics are something that allow him to be still readable, as he grew to a place where he could sit in judgment of his earlier racial attitudes--and reject them.
His rejection of some of his earlier portrayals (he is on record as categorizing "Tintin in America" as an "error of his youth) allow a reader to see this series as a product of a specific time and place--a product created by a writer who became more politically sophisticated as he gained in years and wisdom.
(re) Reading this episode directly after revisiting "The Broken Ear" is a case in point. Hergé did not stop skewering the political culture of South America, but between 1937 (Broken Ear) and 1976 (Picaros), there had been great changes politically in the world, and the later work acknowledges them. "Picaros" is set in a far subtler, nuanced world--though, as in the earlier book, Hergé holds to the view that leadership, in the imagined South American country of San Theodoros, has little to no impact on the general populace (note the unchanged lot of those living on garbage heaps near the airport, as Tintin, Haddock et al fly in and out of the country).
This said--the verge of adventure, the delight in clever twists, the pleasure of watching familiar characters interact, and the humor are all there. My greatest pleasure in all the Tintins is that they are a delight to reread. This one counts, if not as my favorite Tintin, as one of the most tightly written and best fun.
The Jolly Follies are a brilliant touch.