The hammer factory is not owed anything extra for the derived benefit that their product brings, why should books be different?
Authors just want kickbacks for going after the open-source AI competition in their infancy. Even they see more value in shakedowns than the books themselves.
Nothing. Authors have the exclusive privilege of selling copies of their works. That's all. They do not own their work. The language belongs to all of us. We grant the privilege to encourage original works. Not you nor anyone else own our language.
How much do we have to pay authors for knowledge that we have acquired from reading their books?