What things do I need to own a book for?

[TiwazBlackhand]

I know that to use a Class, Archetype, Feat, Trait, Alternate or additional class features (like new Rage powers or Magus Arcana), and certain other things I need to own a copy of the book that it comes from.

The things I'm not sure of. Do I need to own the book for the following?
-Spells (Do I need APG to cast Spark)
-Weapon/armor Enchants (Do I need Ult Equip to have Impact on my weapon)
-Weapons/armor (Do I need Ult Equip to wield a Meteor Hammer or wear Four-Mirror Armor)
-Specific Gods (To have my Warpriest follow Selket do I need a copy of AP #80: Empty Graves (Mummy’s Mask 2 of 6)?)

Any other things I didn't mention that I would need a book for?

[Gary Bush]

Yes to all those listed. Basically, if there is something that you would like to use, anything, you have to own the resource.

[Preston Hudson]

Basically, any game element outside of the Core Rulebook requires having not only the book the game element appears in but a copy of the current Additional Resources as well.

[Ascalaphus]

Preston Hudson wrote:

Basically, any game element outside of the Core Rulebook requires having not only the book the game element appears in but a copy of the current Additional Resources as well.

Nowadays being able to show the Additional Resources on your phone sould suffice for that part. Paizo doesn't hate trees.

[Preston Hudson]

Lau Bannenberg wrote:

Preston Hudson wrote:

Basically, any game element outside of the Core Rulebook requires having not only the book the game element appears in but a copy of the current Additional Resources as well.

Nowadays being able to show the Additional Resources on your phone sould suffice for that part. Paizo doesn't hate trees.

I have no problem with someone showing me the Additional Resources on their phone. As long as the player has checked it to insure their characters remain legal for play regardless if they have printed it or are displaying it on their phone.