(Difficulty:17 1+1=2) No other materials besides this have been able to be extracted from the tower. This work, (Difficulty:8 14+1+1=16) does contain the name, Strikegift, and(2x over difficulty, bonus information gained) location of the tower.
Looking through your books (Difficulty:11 12+1=14), you also find that in the first year after the dwarves returned, he was attacked by a hydra, and sought to extend his own life 6 years later. (Difficulty:7 18+1=19) His master, being much more vain, has more books available. He was king the first ten years of the current era, and (bonus information) had learned the secrets of life and death one year before he left. His tower was made one year after he abdicated the throne.
(Difficulty:19 20+1+1=22) You find out that the name of the slab that his master learned from is Gripblisters. On a whim, you look up other slabs, and discover that one “The Fatal Funeral” was lost within Growledmurders, along with the one who learned from it, who was killed by an arrow. The city is now abbandoned. That slab does have a legacy, the necromancers of springmead. There is also another slab, “Putridcanyons” that was stored within a nearby fortress that is now in ruins. It’s legacy is the tower Slingday.
(Difficulty:15 14+1=15) Ùshrir also had some children after he came to the tower, (Difficulty:14 20+1=21) two of his children wrote about him having an apprentice by the same name.
Time to finish searching for the information above: 45 minutes