I'd appreciate some clarification, just in case I'm missing key game mechanics.
Some spells require mastery of a section of the Necronomicon. Does mastery come by reading once? If not, what would count as mastery? Must the book still be used to cast mastered spells? I could not find any Pathfinder rules about mastering spellbooks.
What if a spell, like contact entity, is not on a class's list? Does the Necronomicon impart special ability to still cast it?
Thank you.