I think kunikida would have an existential crisis if he saw the book or a page or part of a page of the book. He could then replicate it, which means that he has to decide whether to not summon pages knowing that he could cause infinite great things with it, like ending world hunger or crime, but if he does, he risks it falling into the wrong hands and also being an authoritarian of sorts. Would he use it for emergencies? Will he start to expand what counts as an emergency? This ability would also be extremely dangerous because Kunikida is so gullible, so it would be easier to manipulate him into using it for something under the guise of his ideals and/or stealing it once it's summoned.