Tintin's latest adventure is taking him to Sotheby's and Christie's in Paris this month, as booming prices for comic books attract the attention of ultra-rich collectors.
Both auction houses have organised major sales of comic and graphic novel items in the French capital this month that are expected to rake in millions.
It is the first time Sotheby's is entering the world of comics, after Christie's held an auction last April that raised more than four million euros ($A5.77 million).
That was followed in May by a record-breaking single sale - an original 1937 Tintin book that went for 2.6 million euros by French auction house Artcurial.
Sotheby's will put 288 books, storyboards and drawings up for sale on Saturday, including around 50 signed by Tintin cartoonist Herge.
One of his drawings from 1938 is valued between 430,000 and 480,000 euros.
Christie's holds its sale a week later, with 446 works on offer, including 10 Tintin originals with a total value estimated at 1.5 million euros.
"Tintin is part of history," said Eric Leroy, an comics expert at Artcurial, who said the Belgian cartoonist's value will not be dropping any time soon because "it is becoming very difficult to find good quality drawings by Herge today".
Other major items at the auction include an original cover and storyboard of Asterix and Obelix, each valued at more than 100,000 euros.
Cartoons for film posters are also expected to garner attention, with one for 1980s Alain Resnais classic My American Uncle by artist Enki Bilal valued at up to 75,000 euros.
For now, most attention comes from buyers in French-speaking countries - up to 90 per cent - since sales rely on a heavy dose of nostalgia, said Leroy.
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