Thirding Asterix! I grew up with those books, re-reading them all the time, and they grew up with me - when I was six, most of it went right over my head, then, each time I went back to it, I understood another reference or a new joke (even now, I intend to re-read the whole collection next time I visit my parents; I'm sure there are jokes still to be discovered about politics in the 70s or whatever)
And I saw some of the Lucky Luke albums had been translated in English too - another institution in France, same writer, highly recommended!