Each page in this 50 page book can have arcane notes of a specific Spell with Augments applied to it. Preparing a page requires a number of minutes equal to Tier squared. You may treat the Tier of a page as any amount lower.
When you Manifest that Spell with the specific Augments, reduce your DL to Manifest by the Tier of the page. If you did not write the page, you must identify it as a magic object with DL 6 + the Tier to use it.