First I have to say that my 8 year-old son has recently become obsessed with Tintin comics and we already own and have read (together) about half of the fairly extensive catalog. I would whole-heartedly recommend any of the titles we have read (except maybe the ones in space that made me feel slightly claustrophobic), but we both particularly enjoyed Tintin in Tibet. It is a very sweet story of friendship between two young men of from different cultures (Tintin dreams that his friend Chang is in trouble and travels all the way to Tibet to try to rescue him). There is plenty of danger and adventure along the way including a run-in with a man- eating abominable snow man (might scare younger children). The graphic novels seem distinctly French, lots of whisky drinking by the Tintin’s friend the old sea captain and tendency to yell long strings of creative insults when angered “Cucumber! Anarchist! Ectoplasm! Pirate! Vegetarian!”
Recommended despite danger that your child might start yelling “Mixed Green Salad!” at his adversaries.