why is my spellcaster spellbook 2 spells wont unlock

@EndlessSims3 

Have you gone back to the Magic HQ and asked the Sages to teach you their Ultimate spell? It is a separate option that only shows up on them when you've reached the Master Spellcaster level. Each Sage has one and Strangify is one of those.  And there is no spell book for those 3 spells either. You must learn them from the Sages.

Hope this helps.