Here is the most common photo of the Nag Hammadi books; I have linked this back to Wikipedia since its copyright is in dispute so anyone who is interested can go there to read about it. The books were just discovered in 1945, so the photograph is not so old. The books, though, are very old, dating from the 3rd or 4th century.
There aren't many photos of these books, because they were dismantled for preservation, I believe. View the full Wikipedia article. The content of the books is the primary point of interest for most historians... I, on the other hand, just get annoyed when I google this topic and all I can find is the content! Nothing about the structure!
Ah, but I was very fortunate to attend a great workshop where I learned how they were made and have since created my own nice stash. (There are a couple of them for sale in my Etsy shop).