Just like movies (Godfather, Citizen Kane, Annie Hall) there are certain comics you HAVE TO read. Comics like Maus, Dark Knight Returns, and A Contract with God come to mind. For me, Arzach is certainly on that list.
Moebius is an undisputed master of comics, but in the U.S. his work has yet to be seriously collected and made currently available. I suppose at some point (probably after his death, unfortunately) the entire Moebius library will be published properly, but until then it would be nice to see just this one volume of Arzach available again. The art, compostions, mood, atomosphere, and the mechanics of storytelling in these simple but richly detailed short stories are among the most beautiful ever created in the comics medium and should be read by (and made available to) all.