He motions you to follow him and together you leave the library and continue along the series of narrow and humid corridors.

At a certain point you get to a fork. The Wraith stops abruptly and says: ''Following that corridor you'll find some stairs that lead to the Cript, the place where all the secrets of the Wraiths are kept, a place where only few chosen can enter. If we proceed along the main corridor we'll reach the Tower!''