At 1st level, a familiar adept must select a familiar for his arcane bond. His familiar automatically gains the school familiar archetype but it cannot use its lesser school power until 4th level. At 8th level, it gains access to its greater school power.
This ability alters arcane bond.
A familiar adept stores his spells in his familiar rather than in a spellbook, exactly as a witch does. His familiar can freely trade spells known with a witch’s familiar, provided the spells traded are on both casters’ class spell lists. The familiar adept’s familiar uses the witch rules for familiars, including the increased cost of replacing the familiar.
This ability alters spellbooks.
A familiar adept’s training is focused more deeply on his familiar and his school of magic. At 1st level, 5th level, and every 5 levels thereafter, his familiar gains the ability to use the wizard’s 1st-level school ability one time per day without it counting against the wizard’s daily uses.
Pathfinder Player Companion: Familiar Folio © 2015, Paizo Inc.; Authors: Will McCardell, Philip Minchin, Mark Seifter, and Jerome Virnich