Seals for Tomes

I remember them saying we could exchange seals for tomes but can't find anything about it now. Does anyone know where to go or if they dropped the idea?
Thanks in advance.

I haven't read that, do u remember when u read that or on what?

Check the Rowena Npc in revanants toll. She is next to the myth Npc. I think that might be what your looking for.