Fascinating history. Apparently this injunction from Revelation doesn't cover the entire Bible:

"and if anyone takes away from the words of the book of this prophecy, God will take away his share in the tree of life and in the holy city, which are described in this book."

A library story of my own about religious texts and slavery:

I once (probably late 80's or early 90's) saw at the Theology Department at Emory University a display of a religion journal with a mention of a manuscript in Arabic script by an enslaved African. The journal said the MS was at the Georgia State Library. I went to the Georgia State University Library, but no one there had heard of such a work. One of the librarians suggested that the reference might be to the Library of the State of Georgia in Atlanta (primarily a repository of law books), so I went there, and sure enough the reference librarian brought out the manuscript for me to look at (without gloves!). Afterwards I did some research and found out that the work contained (among other things) the author's recollections for Islamic worship. Over the years, there has been some substantial scholarship about the text and its historical significance.

Here's a two-part discussion about the nature of the manuscript by someone who has studied it at length:

http://progler.blogspot.com/2014/05/ben-ali-and-arabic-diary-part-one.html

http://progler.blogspot.com/2015/06/ben-ali-and-arabic-diary-part-two.html

Since I examined the manuscript at the state library, it has been transferred to the Hargrett Rare Book and Manuscript Library at University of Georgia Libraries (Athens), where (I assume) fortunate visitors will probably have to don gloves if allowed to hold it in their hands.