It seems as if Vertical is publishing Black Jack in both hardcover and softcover, with the hardcover version being exclusive to Diamond (the comics distributor) and the softcover going to bookstores.
The July Previews catalog only has the hardcover listed, at $24.95, and claims that this edition has an extra 20-page story that's not in the softcover edition. See this link:
http://previewsworld.com/public/default ... 71206&ssd=
Amazon.com only has the softcover listed, at $16.95:
http://www.amazon.com/Black-Jack-1-Osam ... 93428727X/
This is somewhat bothersome, as it means that if you want the complete edition, you have to spend an extra $8. That's not so bad for one book, but this is going to be a 12-book series, so the total price difference becomes $96! It also raises the question of whether future volumes of the hardcover edition will also have exclusive content.
I'm thinking that I'll go with the softcover, for economic reasons, but I'm unhappy that I'll be missing the extra content.