"Liber quem si quis [abstulerit?], morte moriatur, in sartagine coquatur, caducus morbus instet eum et febres, et rotatur, et suspendatur. Amen."

"Whoever [takes away/steals?] this book, may they die the death, be cooked in a pan, get falling sickness and the fevers, and broken on the wheel, and hanged.  Amen."

I think I like this guy.