I like this art. And, as a current resident of Paris, noting the details (particularly the area that leads down into the metro tunnel, the " Passage Interdit au Public - Danger" sign, OMG the metro! Chatelet is a crazy station....) was brilliant and some of them made me squee inside. :D Albert's way of getting Valerian out of the tricky situation at the hospital, and his way of explaining the "really big gun" (:D), were great too.
I hope you don't mind my asking, by the way, but how exactly did you do the scanlation? Was it in a graphics editing program? I have some French-language comics that might be worth sharing too, and I was wondering if I should/could translate and post it myself.
And lastly, despite my self-proclaimed love of BD, I don't think I'd heard of this one before. Thanks for posting the scans!