Changes Jan 23rd/24th 
We plan to release a small fix (separate from the upcoming hotfix) as some pages in the Spell Vault were are displaying.
Example of my Spell Book - all spells show 0 pages
Also fixing the Spell Pages on the reward screen to show you Page progress of the spells current rarity towards the next. Instead of currently showing Spell Pages required to upgrade from common to your next rarity
Example below: I have been rewarded 10 Spell pages, which means I have more than enough to upgrade my spell to the next rarity
I then upgraded my spell. Later I received 1 page
If I had not upgraded the Spell rarity, it would continue to count up, so it would have displayed 15/10