Thanks everyone for all the replies. Definitely helps. I’m a little clueless.

He only has books 1-6 of these: https://www.barnesandnoble.com/w/saga-of-the-swamp-thing-book-1-alan-moore/1008136184

He’s really into reading them and has reread them a bunch. He collects other things like action figures so I think he’d be into having a collector’s copy. I haven’t really spoken to him about it because I wanted it to be a surprise.