The Words of Solen Reimgar as Chronicled by Parthalan
"I know, I was visited too, yes, in my sleep, the same vision. She may be wicked, but we might use this to our advantage. Perhaps we can harness her power to aid our journey. We are lost, and surely this magician holds the knowledge and secrets of this place. I know these wizards, they crave power, perhaps we can barter with this sorceress, Maura Chalin."
Acquiring the book in Reddle Mane's office requires stealing it.