A wizard's starting spell book contains 10 cantrips and I think 8 first level spells. As the wizard increases in level, he adds 2 spells of any spell level he can cast. Does that include cantrips? IAC, any spells not added to the book in this way must be obtained somehow in game, or perhaps via a feat. Seems like a waste of a feat, if it can be done, but what do I know?
Am I missing anything?
Look at the Arcana skill. You can pay to add spells to your book, and do a skill check to prepare from others’ books.
that's what I meant by "obtained in game".
Well there’s no feat.