Make sure you read the previous Tintin Adventure, "The Secret of the Unicorn," otherwise you will really not know all about the background on Red Racham's Treasure," despite the fact Hergé offers a bit of a recapitulation in the form of a conversation overhead in a bar. The main thing is that having collected all the clues regarding the titular treasure, Tintin and Captain Haddock are prepared to go forth and find it. However, almost as important as the search for the treasure is our introduction to the final pivotal member of the Tintin family, as Professor Calculus offers the service of his small shark-proof submarine for exploring the ocean floor. Tintin refuses the offer, but it turns out that Professor Calculus always hears somkething other than what somebody is really saying. Adding to the fun are the Thom(p)sons, who come along with orders to protect Tintin. "Red Rackham's Treasure" is mostly a pure adventure story, with Tintin using the small submarine and a deep sea diving suit to look for the treasure of the Unicorn. But there is still some detective work left to be done to decipher the final cryptic clues left by Sir Francis Haddock concerning the treasure's location. I still like Hergé's two-part adventure that sent Tintin to the Moon, but this two-parter is not far behind. This is the last of the Tintin stories Hergé wrote during World War II, and after this point we will definitely see his stories become much more allegorical in terms of post-War Europe.