A few setting specific backgrounds (such as the Izzet Engineer from Ravnica) and lineages (such as the Mark of Handling Human from Eberron) have spells that are "added to the spell list of your spellcasting class", and a couple of magic items might contain spells that "are wizard spells for you while you are attuned to it".
Given that for an Order of Scribes wizard:
"When you cast a wizard spell with a spell slot, you can temporarily replace its damage type with a type that appears in another spell in your spellbook...The latter spell must be of the same level as the spell slot you expend."
How many spells can you add, in one character, from sources like these to the Wizard spell list that are useful for the Awakened Spellbook, as a source or target of a type of damage to be replaced?