Thanks to the kindness of happy2beso, I have almost flushed out my collection of Denver-minted state quarters. I still have the Philidelphia-minted Kentucky hole in my collection. The holes in my Denver-minted collection have narrowed down to North Carolina, Vermont, Mississippi, and Missouri. I also have holes in my book for the Arkansas quarter, both Philadelphia-minted and Denver-minted, but I don't think it's been released yet. It's really neat to look at my book and only see seven holes in it now. Next year, I get to start fresh with a brand new book.