[constantcrying]

>Stocking a book in a library is possessing it.

Nope. That is not how (most) libraries work. School libraries purchase books, which then are owned by the school and managed by librarians.

>Years in prison for a library having a book in its collection.

Libraries do not go to prison.

>Telling libraries that they should not stock books is antithetical to freedom and liberty.

Libraries are curated in all cases. The speech they provide is 100% determined by the purchasers and staffers. If those people are ideological, then so are the contents of libraries. Calling them a bastion of free speech is hilarious.

Personally I never looked at any book in my school library and avoided anything but the technical books in university.