Strahein said that High Priest Esras took the book upstairs. Take the book from her and deliver it to Tristran.
Step 1. Open the secret door and go upstairs. Take back the book from High Priest EsrasA high priest found in the Alquimia Research Center. and deliver it to TristranA Shadow Judge dispatched to Beluslan Fortress. She has a no-nonsense attitude.. (You need to collect: Israphel Hymn Book)