When Chanukkah was instituted the scriptural canon had already been closed by the 'Anshei-HaKenesset HaGedolah (the Men of the Great Assembly), so the books could not be added. As to whether they were written under Ruach HaQodesh (Divine inspiration), it is theoretically possible. After all, there were many Divinely-inspired prophecies over the years in Biblical times which were not preserved or canonized because they did not deal with matters beyond their own time. The prophetic books in the TaNa"KH were canonized because they apply to all future generations (up to the coming of Mashiach).
Or, in a literal translation, "holy spirit." Of course, in the original Hebrew, you're right that "holy spirit" (Ruach H'Kodesh) means nothing more than divine inspiration. I've never quite figured out how Christians transformed it into an entity or person in the godhead.