(In the US) Reading a book aloud is considered a performance and the book's copyright protects it. You could read it aloud (and make money with it) only so long

(In the US) Reading a book aloud is considered a performance and the book's copyright protects it. You could read it aloud (and make money with it) only so long as your activity is covered by fair use doctrine. If you want a more YouTube-relatable analogy, the passages from the book would need to be treated like the original content in a reaction video.