Pathfinder: Kingmaker · Base class
Wizard
Can learn many spells but must prepare them for battle; specialization in one magic school grants additional spells and powers.
How it works
The source says Wizards can learn any number of spells but must prepare them for use in battle. It also says specializing in one school of magic grants additional spells and powers based on that school. It does not specify spellbook limits, preparation quantities, or school-specific effects.
Read the supporting references
Check the edition and source version for patch-specific details. Guide methodology.