It was a two-volume hardback, not a trade paperback, which came in a heavy cardboard slipcase. The slipcase used the actual cover from Captain America Comics #1, not a newly drawn version of that cover (the one in your link looks like Kevin Maguire). I remember holding off on buying it as it was very expensive for the time (like $60-90). I sold the books off years ago, so I can't look up an ISBN or anything.