A really good book until. . .

I made a book. I had the text block already sewn and glued and the book boards cut (to not the right size). Found a scrap of painted paper and painted it some more. Decided on the bookcloth. Took me forever to do the spine and the case and then the casing in. But I did it. It was a really good book. Pages lined up on the cover, the book edges matched, and the corners were square. Sometime between when I took the book out from under the weights and admired it for a while and today, I set it down where I had also set down a cookie sometime earlier. The really good book now has a few cookie crumb oil spots on the back cover. Not so bad and I expect some flaws anyway and if this is the worst flaw then it's still a really good book.