I love looking at people's bookshelves and see what they've got. So today, I did a search for Absolute Sandman on Flickr. All pictures shown in this entry are from Flickr and will link back to their respective owners.
Absolute Sandman is actually a 4-volume hardcover compilation of all the Sandman issues. It comes with a slipcase. You can read more about Sandman and its history on Wikipedia.
Here are some Amazon links if you want to find out more on the books. The reviews are overwhelmingly positive.