I don't know if this has been posted, but Titan are doing their own "artist's edition" that will make a nice companion to this.
This time, the book is A L I E N. Written by Archie Goodwin and Published in Heavy Metal waaay back when the film came out. You can get it in two versions A regular SC in colour or a 14' x 17' B&W hardcover that has a whole ton of extras AND each copy of the first run features Walt's signature!
$14.99 for the SC, $75 for the HC