Examine the bookshelves.

You decide to examine the bookshelves.

As you step over the lines of the pentagram, there is a faint crackle and a hint of blue light briefly clouds your vision. However, you seem to be unharmed.

The bookshelves contain a vast number of ancient-looking tomes and scrolls and are covered in a thick layer of dust. Most of them appear to be written in an unknown language, but one or two look readable to you. You're not sure if you should listen to the warning voice and find a way out instead, though.