Library Asks Students to Not Use Cheese as Bookmark

A patron at the University of Liverpool Library was browsing books this week when they came across something disturbing.

The person opened a book to find what appears to be a moldy Kraft Single being used as a bookmark.

Apparently finding food stuffed inside books isn't uncommon in the library world. Tweets began flooding in of things people found as bookmarks.

Twitter users also sent in their best cheese puns.