The wizard’s chest
 

Page 142: "The first is the “wizard’s chest,” which is used with a grimoire
or book of spells. This chest contains all that a wizard needs
to cast spells using a book."

I.e. this is of no use for any spell the wizard actually knows?

The cost keeps the chest (and book spelling) out of the hands of starting characters?

Also do Alchemists or Master Physickers pay attunement costs before crafting potions?