If you're reading this I assume you know who Moebius is. If not, he's a great comic book illustrator and concept artist who'se influence on the way the future looks can not be underestimated. He is one of a handful of artists who made the world look like it does, but who is virtually unknown by people who don't follow such things (Syd Mead is another one). It might be hard to realize this while first leafing through this collection, but I assure you it's true.
I bought this book in a store in Dijon on a trip there a few years ago. It's an amazing book filled with almost everything Moebius created for the original French version of Heavy Metal. Most of it was reprinted in color in the US edition. Many stories were also released by Marvel in the mid 80's (those Moebius 1, 2, 3 etc you see from time to time). Those have been out of print for ages and are very difficult to find. Only a small portion is in color, but I prefer black and white (you can see how the ink is being used) and the quality of the book is excellent.
Size is a bit of a problem, because there's just too much awesome stuff in here. The asking price on amazon is shocking, but it makes sense given the rarity and extraordinary size of the tome. Still 300 dollars is a stiff price, the book itself has a cover price of around 100 euros (around $130) which was totally fair. Excited enthusiasts should go snap up that Arzach reprint if it's still around, and cross your fingers that "Jodoworsky's Dune" creates enough buzz to get some of those European Comics translated and printed in the US.