Lets take today and go back to variants. One that we haven’t covered, is the double cover. At times it may even be a triple cover. These are exactly as they sound. During the binding process two or three covers can stick together and be stapled to one book. Now from my research it doesn’t seem to be from any particular book or year. They can cover almost any year and any book. These covers have been found on some of the most sought after books and on books that would be considered filler books. The front cover is still graded as normal, but the second cover can also be graded. So your book can carry two grades. These variants do carry a premium over there regular counter parts. So make sure you take a quick look at your books and make sure you have not missed one of these.