Medieval Book Curses

In ancient and Medieval times, there were no security gates tripped by discreetly hidden RFID tags. Some of the more valuable books were chained to the shelves, yes, but another low-tech security device was employed to dissuade the superstitious and cowardly lot: Book curses!

Some examples of book curses:

He who steals this book
may he die the death
may he be frizzled in a pan.

Steal not this Book my honest Friend
For fear the Galows should be your hend,
And when you die the Lord will say
And wares the Book you stole away?

For him that Stealeth a Book from this Library,
Let it change into a Serpent in his hand & rend him.
Let him be struck with Palsy, & all his Members blasted.
Let him languish in Pain crying aloud for Mercy,
Let there be no Surcease to his Agony till he sink to Dissolution.
Let Bookworms gnaw his Entrails in token of the Worm that dieth not,
When at last he goeth to his final Punishment,
Let the flames of hell consume him for ever & aye.

Too bad the last one is apocryphal, because it's pretty gnarly.