Can I sell single pages out of published art books that depicts an artist works?

If you own a book and sell pages (not copies, but the actual pages) from the book you own, you have not copied anything, so there should be no copyright infringement. There have been legal actions in the past for activies modifying the art work of artists. Colorizing movies, altering the resolution, restoring art, etc. There may be a cause of action related to modifying art work (in this case, the art work is the book), but I have no knowledge of it applied to your hypothetical facts. Good luck, Todd